diff --git a/WhereAreYou/WhereAreYou/Core/AppDelegate.swift b/WhereAreYou/WhereAreYou/Core/AppDelegate.swift
index ad80884..f667e40 100644
--- a/WhereAreYou/WhereAreYou/Core/AppDelegate.swift
+++ b/WhereAreYou/WhereAreYou/Core/AppDelegate.swift
@@ -22,6 +22,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         }
         FirebaseApp.configure()
         configureFirebaseEmulators()
+        DIContainer.shared.registerDependencies()
         return true
     }
 
diff --git a/WhereAreYou/WhereAreYou/Core/DI/AppDIContainer+Register.swift b/WhereAreYou/WhereAreYou/Core/DI/AppDIContainer+Register.swift
new file mode 100644
index 0000000..b0a9a0e
--- /dev/null
+++ b/WhereAreYou/WhereAreYou/Core/DI/AppDIContainer+Register.swift
@@ -0,0 +1,34 @@
+//
+//  AppDIContainer+Register.swift
+//  WhereAreYou
+//
+//  Created by 김성훈 on 8/26/26.
+//
+
+extension DIContainer {
+
+    func registerDependencies() {
+        // 위치
+        let coreLocationRepository = CoreLocationRepository()
+        register(LocationRepository.self, instance: coreLocationRepository)
+        register(LocationPermissionRepository.self, instance: coreLocationRepository)
+
+        // 약속 생성/조회
+        register(AppointmentCreationRepository.self) { MockAppointmentCreationRepository() }
+        register(AppointmentDetailRepository.self) { MockAppointmentDetailRepository() }
+        register(AppointmentInfoRepository.self) { MockAppointmentInfoRepository() }
+
+        // 채팅
+        register(ChatRepository.self) { MockChatRepository() }
+
+        // 장소 검색/조회
+        register(NearbyPlaceRepository.self) { MockNearbyPlaceRepository() }
+        register(PlaceSearchRepository.self) { MockPlaceSearchRepository() }
+        register(ReverseGeocodingRepository.self) { MockReverseGeocodingRepository() }
+        register(SharedPlaceRepository.self) { MockSharedPlaceRepository() }
+
+        // 길찾기
+        register(RouteSearchRepository.self) { MockRouteSearchRepository() }
+    }
+
+}
diff --git a/WhereAreYou/WhereAreYou/Core/DI/DIContainer.swift b/WhereAreYou/WhereAreYou/Core/DI/DIContainer.swift
new file mode 100644
index 0000000..84ed742
--- /dev/null
+++ b/WhereAreYou/WhereAreYou/Core/DI/DIContainer.swift
@@ -0,0 +1,34 @@
+//
+//  DIContainer.swift
+//  WhereAreYou
+//
+//  Created by 김성훈 on 8/26/26.
+//
+
+import Foundation
+
+/// register/resolve 방식의 DI 컨테이너
+final class DIContainer {
+
+    static let shared = DIContainer()
+
+    private var factories: [ObjectIdentifier: () -> Any] = [:]
+
+    private init() { }
+
+    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
+        factories[ObjectIdentifier(type)] = factory
+    }
+
+    func register<T>(_ type: T.Type, instance: T) {
+        factories[ObjectIdentifier(type)] = { instance }
+    }
+
+    func resolve<T>(_ type: T.Type = T.self) -> T {
+        guard let factory = factories[ObjectIdentifier(type)], let resolved = factory() as? T else {
+            fatalError("\(type)가 DIContainer에 등록되어 있지 않습니다.")
+        }
+        return resolved
+    }
+
+}
diff --git a/WhereAreYou/WhereAreYou/Data/MockAppointmentDetailRepository.swift b/WhereAreYou/WhereAreYou/Data/MockAppointmentDetailRepository.swift
index 92c76bb..ca1297c 100644
--- a/WhereAreYou/WhereAreYou/Data/MockAppointmentDetailRepository.swift
+++ b/WhereAreYou/WhereAreYou/Data/MockAppointmentDetailRepository.swift
@@ -19,7 +19,22 @@ final class MockAppointmentDetailRepository: AppointmentDetailRepository {
         }
     }
 
+    func fetchAppointment(
+        code: String,
+        completion: @escaping (Result<(appointment: Appointment, currentUserID: String), Error>) -> Void
+    ) {
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+            guard code == Self.mockCode else {
+                completion(.failure(AppError.notFound))
+                return
+            }
+            let appointment = Self.makeMockAppointment(appointmentID: "appointment_joined")
+            completion(.success((appointment: appointment, currentUserID: Self.currentUserID)))
+        }
+    }
+
     private static let currentUserID = "user_me"
+    private static let mockCode = "MOCK1234"
 
     private static func profileImageURL(_ assetName: String) -> URL {
         URL(string: "asset://\(assetName)")!
@@ -133,7 +148,7 @@ final class MockAppointmentDetailRepository: AppointmentDetailRepository {
 
         return Appointment(
             id: appointmentID,
-            code: "MOCK1234",
+            code: Self.mockCode,
             name: "고기굽는방앗간 이수역점",
             dateTime: now.addingTimeInterval(13 * 60),
             place: place,
diff --git a/WhereAreYou/WhereAreYou/Domain/Repository/AppointmentDetailRepository.swift b/WhereAreYou/WhereAreYou/Domain/Repository/AppointmentDetailRepository.swift
index dee4fc3..06b0992 100644
--- a/WhereAreYou/WhereAreYou/Domain/Repository/AppointmentDetailRepository.swift
+++ b/WhereAreYou/WhereAreYou/Domain/Repository/AppointmentDetailRepository.swift
@@ -14,4 +14,9 @@ protocol AppointmentDetailRepository {
         completion: @escaping (Result<(appointment: Appointment, currentUserID: String), Error>) -> Void
     )
 
+    func fetchAppointment(
+        code: String,
+        completion: @escaping (Result<(appointment: Appointment, currentUserID: String), Error>) -> Void
+    )
+
 }
diff --git a/WhereAreYou/WhereAreYou/Domain/UseCase/JoinAppointmentUseCase.swift b/WhereAreYou/WhereAreYou/Domain/UseCase/JoinAppointmentUseCase.swift
new file mode 100644
index 0000000..16100f6
--- /dev/null
+++ b/WhereAreYou/WhereAreYou/Domain/UseCase/JoinAppointmentUseCase.swift
@@ -0,0 +1,23 @@
+//
+//  JoinAppointmentUseCase.swift
+//  WhereAreYou
+//
+//  Created by 김성훈 on 8/26/26.
+//
+
+final class JoinAppointmentUseCase {
+
+    private let repository: AppointmentDetailRepository
+
+    init(repository: AppointmentDetailRepository) {
+        self.repository = repository
+    }
+
+    func execute(
+        code: String,
+        completion: @escaping (Result<(appointment: Appointment, currentUserID: String), Error>) -> Void
+    ) {
+        repository.fetchAppointment(code: code, completion: completion)
+    }
+
+}
diff --git a/WhereAreYou/WhereAreYou/Presentation/AppointmentCreation/AppointmentCreationViewController.swift b/WhereAreYou/WhereAreYou/Presentation/AppointmentCreation/AppointmentCreationViewController.swift
index 51c9585..e4b8c4b 100644
--- a/WhereAreYou/WhereAreYou/Presentation/AppointmentCreation/AppointmentCreationViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/AppointmentCreation/AppointmentCreationViewController.swift
@@ -119,8 +119,8 @@ extension AppointmentCreationViewController {
         card.onCopyCodeTap = {
             UIPasteboard.general.string = info.code
         }
-        card.onConfirmTap = {
-            // TODO: 약속 화면으로 이동
+        card.onConfirmTap = { [weak self] in
+            self?.presentChat(appointmentInfo: info)
         }
 
         view.addSubview(card)
@@ -141,6 +141,34 @@ extension AppointmentCreationViewController {
         }
     }
 
+    private func presentChat(appointmentInfo: AppointmentInfo) {
+        guard let navigationController else { return }
+
+        let chatRepository = DIContainer.shared.resolve(ChatRepository.self)
+        let chatViewModel = ChatViewModel(
+            appointmentInfo: appointmentInfo,
+            fetchMessagesUseCase: FetchMessagesUseCase(repository: chatRepository),
+            sendMessageUseCase: SendMessageUseCase(repository: chatRepository),
+            getCurrentLocationUseCase: GetCurrentLocationUseCase(
+                repository: DIContainer.shared.resolve(LocationRepository.self)
+            ),
+            shareLocationUseCase: ShareLocationUseCase(repository: chatRepository),
+            sharePlaceUseCase: SharePlaceUseCase(
+                chatRepository: chatRepository,
+                sharedPlaceRepository: DIContainer.shared.resolve(SharedPlaceRepository.self)
+            )
+        )
+        let chatViewController = ChatViewController(viewModel: chatViewModel)
+
+        var viewControllers = navigationController.viewControllers
+        if let index = viewControllers.firstIndex(of: self) {
+            viewControllers[index] = chatViewController
+        } else {
+            viewControllers.append(chatViewController)
+        }
+        navigationController.setViewControllers(viewControllers, animated: true)
+    }
+
     // MARK: - Date Picker
 
     private func presentDatePicker() {
@@ -167,7 +195,7 @@ extension AppointmentCreationViewController {
         let searchPlaceViewController = SearchPlaceCardViewController(
             viewModel: SearchPlaceCardViewModel(
                 searchPlacesUseCase: SearchPlacesUseCase(
-                    repository: MockPlaceSearchRepository()
+                    repository: DIContainer.shared.resolve(PlaceSearchRepository.self)
                 )
             ),
             selectionButtonTitle: "선택하기",
@@ -192,11 +220,11 @@ extension AppointmentCreationViewController {
     private func presentPlaceMapSelection() {
         let placeSelectionViewModel = PlaceSelectionViewModel(
             getCurrentLocationUseCase: GetCurrentLocationUseCase(
-                repository: CoreLocationRepository()
+                repository: DIContainer.shared.resolve(LocationRepository.self)
             ),
             getNearbyPlaceUseCase: GetNearbyPlaceUseCase(
-                nearbyPlaceRepository: MockNearbyPlaceRepository(),
-                reverseGeocodingRepository: MockReverseGeocodingRepository()
+                nearbyPlaceRepository: DIContainer.shared.resolve(NearbyPlaceRepository.self),
+                reverseGeocodingRepository: DIContainer.shared.resolve(ReverseGeocodingRepository.self)
             ),
             initialCoordinate: viewModel.place?.coordinate
         )
diff --git a/WhereAreYou/WhereAreYou/Presentation/AppointmentList/AppointmentListViewController.swift b/WhereAreYou/WhereAreYou/Presentation/AppointmentList/AppointmentListViewController.swift
index ce8b34e..cd02afd 100644
--- a/WhereAreYou/WhereAreYou/Presentation/AppointmentList/AppointmentListViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/AppointmentList/AppointmentListViewController.swift
@@ -198,11 +198,11 @@ final class AppointmentListViewController: UIViewController {
         }()
 
         let card = AppointmentListCard(item: item, accessoryView: remainingTimeLabel)
-        card.onChatTap = {
-            print("\(item.title) 대화 열기")
+        card.onChatTap = { [weak self] in
+            self?.presentChat(appointmentID: item.id)
         }
-        card.onMapTap = {
-            print("\(item.title) 지도 열기")
+        card.onMapTap = { [weak self] in
+            self?.presentAppointmentRoute(appointmentID: item.id)
         }
         card.contextMenuProvider = { [weak self] in
             self?.makeContextMenu(id: item.id) ?? UIMenu(children: [])
@@ -245,4 +245,40 @@ final class AppointmentListViewController: UIViewController {
         navigationController?.pushViewController(PastAppointmentListViewController(), animated: true)
     }
 
+    // MARK: - Chat / Route
+
+    private func presentChat(appointmentID: String) {
+        let repository = DIContainer.shared.resolve(AppointmentInfoRepository.self)
+        FetchAppointmentInfoUseCase(repository: repository).execute(appointmentID: appointmentID) { [weak self] result in
+            DispatchQueue.main.async {
+                guard let self, case .success(let appointment) = result else { return }
+                let chatRepository = DIContainer.shared.resolve(ChatRepository.self)
+                let viewModel = ChatViewModel(
+                    appointmentInfo: AppointmentInfo(appointment: appointment),
+                    fetchMessagesUseCase: FetchMessagesUseCase(repository: chatRepository),
+                    sendMessageUseCase: SendMessageUseCase(repository: chatRepository),
+                    getCurrentLocationUseCase: GetCurrentLocationUseCase(
+                        repository: DIContainer.shared.resolve(LocationRepository.self)
+                    ),
+                    shareLocationUseCase: ShareLocationUseCase(repository: chatRepository),
+                    sharePlaceUseCase: SharePlaceUseCase(
+                        chatRepository: chatRepository,
+                        sharedPlaceRepository: DIContainer.shared.resolve(SharedPlaceRepository.self)
+                    )
+                )
+                self.navigationController?.pushViewController(ChatViewController(viewModel: viewModel), animated: true)
+            }
+        }
+    }
+
+    private func presentAppointmentRoute(appointmentID: String) {
+        let routeViewModel = AppointmentRouteViewModel(
+            appointmentID: appointmentID,
+            getAppointmentDetailUseCase: GetAppointmentDetailUseCase(
+                repository: DIContainer.shared.resolve(AppointmentDetailRepository.self)
+            )
+        )
+        present(AppointmentRouteViewController(viewModel: routeViewModel), animated: true)
+    }
+
 }
diff --git a/WhereAreYou/WhereAreYou/Presentation/AppointmentList/PastAppointmentListViewController.swift b/WhereAreYou/WhereAreYou/Presentation/AppointmentList/PastAppointmentListViewController.swift
index fbfd4cf..91ff77c 100644
--- a/WhereAreYou/WhereAreYou/Presentation/AppointmentList/PastAppointmentListViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/AppointmentList/PastAppointmentListViewController.swift
@@ -101,11 +101,11 @@ final class PastAppointmentListViewController: UIViewController {
 
     private func addCard(for item: AppointmentListItem) {
         let card = AppointmentListCard(item: item, accessoryView: nil)
-        card.onChatTap = {
-            print("\(item.title) 대화 열기")
+        card.onChatTap = { [weak self] in
+            self?.presentChat(appointmentID: item.id)
         }
-        card.onMapTap = {
-            print("\(item.title) 지도 열기")
+        card.onMapTap = { [weak self] in
+            self?.presentAppointmentRoute(appointmentID: item.id)
         }
         card.contextMenuProvider = { [weak self] in
             self?.makeContextMenu(id: item.id) ?? UIMenu(children: [])
@@ -144,4 +144,40 @@ final class PastAppointmentListViewController: UIViewController {
         present(alert, animated: true)
     }
 
+    // MARK: - Chat / Route
+
+    private func presentChat(appointmentID: String) {
+        let repository = DIContainer.shared.resolve(AppointmentInfoRepository.self)
+        FetchAppointmentInfoUseCase(repository: repository).execute(appointmentID: appointmentID) { [weak self] result in
+            DispatchQueue.main.async {
+                guard let self, case .success(let appointment) = result else { return }
+                let chatRepository = DIContainer.shared.resolve(ChatRepository.self)
+                let viewModel = ChatViewModel(
+                    appointmentInfo: AppointmentInfo(appointment: appointment),
+                    fetchMessagesUseCase: FetchMessagesUseCase(repository: chatRepository),
+                    sendMessageUseCase: SendMessageUseCase(repository: chatRepository),
+                    getCurrentLocationUseCase: GetCurrentLocationUseCase(
+                        repository: DIContainer.shared.resolve(LocationRepository.self)
+                    ),
+                    shareLocationUseCase: ShareLocationUseCase(repository: chatRepository),
+                    sharePlaceUseCase: SharePlaceUseCase(
+                        chatRepository: chatRepository,
+                        sharedPlaceRepository: DIContainer.shared.resolve(SharedPlaceRepository.self)
+                    )
+                )
+                self.navigationController?.pushViewController(ChatViewController(viewModel: viewModel), animated: true)
+            }
+        }
+    }
+
+    private func presentAppointmentRoute(appointmentID: String) {
+        let routeViewModel = AppointmentRouteViewModel(
+            appointmentID: appointmentID,
+            getAppointmentDetailUseCase: GetAppointmentDetailUseCase(
+                repository: DIContainer.shared.resolve(AppointmentDetailRepository.self)
+            )
+        )
+        present(AppointmentRouteViewController(viewModel: routeViewModel), animated: true)
+    }
+
 }
diff --git a/WhereAreYou/WhereAreYou/Presentation/Chat/AppointmentInfo/AppointmentInfoViewController.swift b/WhereAreYou/WhereAreYou/Presentation/Chat/AppointmentInfo/AppointmentInfoViewController.swift
index 49431b3..800b213 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Chat/AppointmentInfo/AppointmentInfoViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Chat/AppointmentInfo/AppointmentInfoViewController.swift
@@ -143,7 +143,7 @@ final class AppointmentInfoViewController: UIViewController {
         let searchPlaceViewController = SearchPlaceCardViewController(
             viewModel: SearchPlaceCardViewModel(
                 searchPlacesUseCase: SearchPlacesUseCase(
-                    repository: MockPlaceSearchRepository()
+                    repository: DIContainer.shared.resolve(PlaceSearchRepository.self)
                 )
             ),
             selectionButtonTitle: "선택하기",
@@ -167,11 +167,11 @@ final class AppointmentInfoViewController: UIViewController {
     private func presentPlaceMapSelection() {
         let placeSelectionViewModel = PlaceSelectionViewModel(
             getCurrentLocationUseCase: GetCurrentLocationUseCase(
-                repository: CoreLocationRepository()
+                repository: DIContainer.shared.resolve(LocationRepository.self)
             ),
             getNearbyPlaceUseCase: GetNearbyPlaceUseCase(
-                nearbyPlaceRepository: MockNearbyPlaceRepository(),
-                reverseGeocodingRepository: MockReverseGeocodingRepository()
+                nearbyPlaceRepository: DIContainer.shared.resolve(NearbyPlaceRepository.self),
+                reverseGeocodingRepository: DIContainer.shared.resolve(ReverseGeocodingRepository.self)
             ),
             initialCoordinate: viewModel.appointmentInfo?.location?.coordinate
         )
diff --git a/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewController.swift b/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewController.swift
index 15f42ca..64d8159 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewController.swift
@@ -52,7 +52,9 @@ final class ChatViewController: UIViewController {
                 for: indexPath
             ) as! ChatBubbleCell
             let spacing = self?.topSpacing(at: indexPath.item) ?? 0
-            cell.configure(with: item, topSpacing: spacing)
+            cell.configure(with: item, topSpacing: spacing) { [weak self] _ in
+                self?.presentAppointmentRoute()
+            }
             return cell
         }
     }()
@@ -126,6 +128,7 @@ final class ChatViewController: UIViewController {
     init(viewModel: ChatViewModel) {
         self.viewModel = viewModel
         super.init(nibName: nil, bundle: nil)
+        hidesBottomBarWhenPushed = true
     }
 
     required init?(coder: NSCoder) {
@@ -181,12 +184,21 @@ final class ChatViewController: UIViewController {
     }
 
     @objc private func mapButtonTapped() {
-        // TODO: 지도 화면으로 전환
+        presentAppointmentRoute()
+    }
+
+    private func presentAppointmentRoute() {
+        let routeViewModel = AppointmentRouteViewModel(
+            appointmentID: viewModel.appointmentInfo.id,
+            getAppointmentDetailUseCase: GetAppointmentDetailUseCase(
+                repository: DIContainer.shared.resolve(AppointmentDetailRepository.self)
+            )
+        )
+        present(AppointmentRouteViewController(viewModel: routeViewModel), animated: true)
     }
 
     @objc private func moreButtonTapped() {
-        // TODO: DIContainer 도입 시 의존성 주입 방식 변경
-        let repository = MockAppointmentInfoRepository()
+        let repository = DIContainer.shared.resolve(AppointmentInfoRepository.self)
         let fetchUseCase = FetchAppointmentInfoUseCase(repository: repository)
         let updateUseCase = UpdateAppointmentInfoUseCase(repository: repository)
         let appointmentInfoVM = AppointmentInfoViewModel(
@@ -314,8 +326,7 @@ final class ChatViewController: UIViewController {
     }
 
     private func handleSearchPlace() {
-        // TODO: DIContainer 도입 시 의존성 주입 방식 변경
-        let searchPlacesUseCase = SearchPlacesUseCase(repository: MockPlaceSearchRepository())
+        let searchPlacesUseCase = SearchPlacesUseCase(repository: DIContainer.shared.resolve(PlaceSearchRepository.self))
         let searchPlaceCardVM = SearchPlaceCardViewModel(searchPlacesUseCase: searchPlacesUseCase)
         let shareMeVC = SearchPlaceCardViewController(
             viewModel: searchPlaceCardVM,
@@ -335,8 +346,7 @@ final class ChatViewController: UIViewController {
     }
 
     private func handleViewSharedPlaces() {
-        // TODO: DIContainer 도입 시 의존성 주입 방식 변경
-        let sharedPlaceRepo = MockSharedPlaceRepository()
+        let sharedPlaceRepo = DIContainer.shared.resolve(SharedPlaceRepository.self)
         let fetchUseCase = FetchSharedPlacesUseCase(repository: sharedPlaceRepo)
         let voteUseCase = VotePlaceUseCase(repository: sharedPlaceRepo)
         let sharedPlacesVM = SharedPlacesViewModel(
diff --git a/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewModel.swift b/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewModel.swift
index afffa10..ba99d68 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewModel.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Chat/ChatViewModel.swift
@@ -143,14 +143,19 @@ private extension ChatViewModel {
             case .text(let text):
                 bubbleContent = text
                 contentType = .text
-            case .locationShare:
+            case .locationShare(let coordinate):
                 bubbleContent = "📌 위치를 공유했어요"
-                contentType = .locationShare
+                contentType = .locationShare(coordinate: coordinate)
             case .placeShare(let place):
                 bubbleContent = place.name
                 let isDuplicate = sharedPlaceIDs.contains(place.id)
                 sharedPlaceIDs.insert(place.id)
-                contentType = .placeShare(placeName: place.name, placeAddress: place.address, isDuplicate: isDuplicate)
+                contentType = .placeShare(
+                    placeName: place.name,
+                    placeAddress: place.address,
+                    coordinate: place.coordinate,
+                    isDuplicate: isDuplicate
+                )
             }
 
             let bubbleItem = ChatBubbleItem(
diff --git a/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleBase.swift b/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleBase.swift
index b0cd5b2..ed0ec93 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleBase.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleBase.swift
@@ -43,6 +43,9 @@ class ChatBubbleBase: UIView {
     private(set) var addressLabel: UILabel?
     private(set) var duplicateLabel: UILabel?
 
+    /// "위치 보기" 버튼 탭 시 호출
+    var onMapTap: ((Coordinate) -> Void)?
+
     init(item: ChatBubbleItem) {
         super.init(frame: .zero)
 
@@ -65,11 +68,11 @@ class ChatBubbleBase: UIView {
         switch item.contentType {
         case .text:
             break
-        case .locationShare:
+        case .locationShare(let coordinate):
             bubbleLabel.font = .boldPreferredFont(forTextStyle: .footnote)
-            actionButton = makeMapButton()
+            actionButton = makeMapButton(coordinate: coordinate)
             bubbleContentStack.addArrangedSubview(actionButton!)
-        case .placeShare(let placeName, let placeAddress, let isDuplicate):
+        case .placeShare(let placeName, let placeAddress, let coordinate, let isDuplicate):
             bubbleLabel.text = "📌 " + placeName
             bubbleLabel.font = .boldPreferredFont(forTextStyle: .callout)
             addressLabel = UILabel()
@@ -84,7 +87,7 @@ class ChatBubbleBase: UIView {
                 duplicateLabel?.textColor = .secondaryLabel
                 bubbleContentStack.addArrangedSubview(duplicateLabel!)
             }
-            actionButton = makeMapButton()
+            actionButton = makeMapButton(coordinate: coordinate)
             bubbleContentStack.addArrangedSubview(actionButton!)
         }
 
@@ -96,7 +99,7 @@ class ChatBubbleBase: UIView {
         fatalError("init(coder:) has not been implemented")
     }
 
-    private func makeMapButton() -> UIButton {
+    private func makeMapButton(coordinate: Coordinate) -> UIButton {
         var config = UIButton.Configuration.plain()
         var attributedTitle = AttributedString("위치 보기")
         attributedTitle.font = .preferredFont(forTextStyle: .caption1)
@@ -108,8 +111,8 @@ class ChatBubbleBase: UIView {
         let button = UIButton(configuration: config)
         button.backgroundColor = .white.withAlphaComponent(0.2)
         button.layer.cornerRadius = 12
-        button.addAction(UIAction { _ in
-            // TODO: 공유된 위치를 중심으로 한 지도 화면 열기
+        button.addAction(UIAction { [weak self] _ in
+            self?.onMapTap?(coordinate)
         }, for: .touchUpInside)
         return button
     }
diff --git a/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleCell.swift b/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleCell.swift
index a2f25de..5f8a217 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleCell.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Chat/SubComponent/ChatBubbleCell.swift
@@ -12,16 +12,21 @@ final class ChatBubbleCell: UICollectionViewCell {
 
     static let reuseID = "ChatBubbleCell"
 
-    func configure(with item: ChatDisplayItem, topSpacing: CGFloat) {
+    func configure(
+        with item: ChatDisplayItem,
+        topSpacing: CGFloat,
+        onMapTap: ((Coordinate) -> Void)? = nil
+    ) {
         contentView.subviews.forEach { $0.removeFromSuperview() }
 
-        let bubbleView: UIView
+        let bubbleView: ChatBubbleBase
         switch item {
         case .myMessage(let bubble):
             bubbleView = MyChatBubble(item: bubble)
         case .otherMessage(let bubble, let showProfile):
             bubbleView = OtherChatBubble(item: bubble, showProfile: showProfile)
         }
+        bubbleView.onMapTap = onMapTap
 
         bubbleView.translatesAutoresizingMaskIntoConstraints = false
         contentView.addSubview(bubbleView)
diff --git a/WhereAreYou/WhereAreYou/Presentation/Home/HomeViewController.swift b/WhereAreYou/WhereAreYou/Presentation/Home/HomeViewController.swift
index 620b203..ef77ccf 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Home/HomeViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Home/HomeViewController.swift
@@ -180,8 +180,8 @@ final class HomeViewController: UIViewController {
         let cards = appointments.map { UpcomingAppointmentCard(appointment: $0) }
 
         zip(cards, appointments).forEach { card, appointment in
-            card.onTap = {
-                print(appointment.title)
+            card.onTap = { [weak self] in
+                self?.presentChat(appointmentID: appointment.id)
             }
             upcomingStack.addArrangedSubview(card)
             card.widthAnchor.constraint(equalTo: createButton.widthAnchor).isActive = true
@@ -199,7 +199,7 @@ final class HomeViewController: UIViewController {
     private func presentAppointmentCreation() {
         let viewModel = AppointmentCreationViewModel(
             createAppointmentUseCase: CreateAppointmentUseCase(
-                repository: MockAppointmentCreationRepository()
+                repository: DIContainer.shared.resolve(AppointmentCreationRepository.self)
             )
         )
         let viewController = AppointmentCreationViewController(viewModel)
@@ -215,8 +215,8 @@ final class HomeViewController: UIViewController {
 
         let sheet = JoinAppointmentSheet()
         sheet.onCancel = { [weak self] in self?.dismissJoinSheet() }
-        sheet.onJoin = { code in
-            print("HomeViewController received join code: \(code)")
+        sheet.onJoin = { [weak self] code in
+            self?.joinAppointment(code: code)
         }
 
         overlay.addSubview(sheet)
@@ -240,6 +240,64 @@ final class HomeViewController: UIViewController {
         joinSheetOverlay = nil
     }
 
+    private func joinAppointment(code: String) {
+        let useCase = JoinAppointmentUseCase(
+            repository: DIContainer.shared.resolve(AppointmentDetailRepository.self)
+        )
+        useCase.execute(code: code) { [weak self] result in
+            DispatchQueue.main.async {
+                guard let self else { return }
+                switch result {
+                case .success(let (appointment, _)):
+                    self.dismissJoinSheet()
+                    self.presentChat(appointmentInfo: AppointmentInfo(appointment: appointment))
+                case .failure:
+                    self.presentJoinFailureAlert()
+                }
+            }
+        }
+    }
+
+    private func presentJoinFailureAlert() {
+        let alert = UIAlertController(
+            title: "약속을 찾을 수 없어요",
+            message: "코드를 다시 확인해 주세요.",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "확인", style: .default))
+        present(alert, animated: true)
+    }
+
+    // MARK: - Chat
+
+    private func presentChat(appointmentID: String) {
+        let repository = DIContainer.shared.resolve(AppointmentInfoRepository.self)
+        FetchAppointmentInfoUseCase(repository: repository).execute(appointmentID: appointmentID) { [weak self] result in
+            DispatchQueue.main.async {
+                guard let self, case .success(let appointment) = result else { return }
+                self.presentChat(appointmentInfo: AppointmentInfo(appointment: appointment))
+            }
+        }
+    }
+
+    private func presentChat(appointmentInfo: AppointmentInfo) {
+        let chatRepository = DIContainer.shared.resolve(ChatRepository.self)
+        let viewModel = ChatViewModel(
+            appointmentInfo: appointmentInfo,
+            fetchMessagesUseCase: FetchMessagesUseCase(repository: chatRepository),
+            sendMessageUseCase: SendMessageUseCase(repository: chatRepository),
+            getCurrentLocationUseCase: GetCurrentLocationUseCase(
+                repository: DIContainer.shared.resolve(LocationRepository.self)
+            ),
+            shareLocationUseCase: ShareLocationUseCase(repository: chatRepository),
+            sharePlaceUseCase: SharePlaceUseCase(
+                chatRepository: chatRepository,
+                sharedPlaceRepository: DIContainer.shared.resolve(SharedPlaceRepository.self)
+            )
+        )
+        navigationController?.pushViewController(ChatViewController(viewModel: viewModel), animated: true)
+    }
+
 }
 
 // MARK: - UIScrollViewDelegate
diff --git a/WhereAreYou/WhereAreYou/Presentation/Home/JoinAppointmentSheet.swift b/WhereAreYou/WhereAreYou/Presentation/Home/JoinAppointmentSheet.swift
index d6dc843..c84e5d3 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Home/JoinAppointmentSheet.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Home/JoinAppointmentSheet.swift
@@ -130,7 +130,7 @@ final class JoinAppointmentSheet: UIView {
     @objc private func dismissKeyboard() { endEditing(true) }
 
     private func pasteTapped() {
-        print("붙여넣기 tapped")
+        codeField.text = UIPasteboard.general.string
     }
 
     private func cancelTapped() {
@@ -138,7 +138,6 @@ final class JoinAppointmentSheet: UIView {
     }
 
     private func joinTapped() {
-        print("참여하기 tapped")
         onJoin?(codeField.text ?? "")
     }
 
diff --git a/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewController.swift b/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewController.swift
index 82a6b82..d8c8638 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewController.swift
@@ -78,6 +78,9 @@ final class AppointmentRouteViewController: UIViewController {
 
     private func bindViewModel() {
         infoView.onChangeRouteTap = { [weak self] in self?.viewModel.changeRouteTapped() }
+        viewModel.onChangeRouteTap = { [weak self] destination in
+            self?.presentRouteSearch(destination: destination)
+        }
 
         viewModel.$placeName
             .receive(on: DispatchQueue.main)
@@ -120,6 +123,24 @@ final class AppointmentRouteViewController: UIViewController {
             .store(in: &cancellables)
     }
 
+    // MARK: - Route Search
+
+    private func presentRouteSearch(destination: Place?) {
+        let routeSearchViewModel = RouteSearchViewModel(
+            searchRoutesUseCase: SearchRoutesUseCase(
+                repository: DIContainer.shared.resolve(RouteSearchRepository.self)
+            ),
+            getCurrentLocationUseCase: GetCurrentLocationUseCase(
+                repository: DIContainer.shared.resolve(LocationRepository.self)
+            )
+        )
+        let routeSearchViewController = RouteSearchViewController(
+            viewModel: routeSearchViewModel, destination: destination
+        )
+        let navigationController = UINavigationController(rootViewController: routeSearchViewController)
+        present(navigationController, animated: true)
+    }
+
     // MARK: - Action
 
     private func closeTapped() {
diff --git a/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewModel.swift b/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewModel.swift
index aee91dd..c89fe36 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewModel.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Map/AppointmentRoute/AppointmentRouteViewModel.swift
@@ -23,8 +23,12 @@ final class AppointmentRouteViewModel {
     /// 조회 실패 시 사용자에게 보여줄 에러 메시지
     @Published private(set) var errorMessage: String?
 
+    /// 경로 변경 버튼 탭 시 호출
+    var onChangeRouteTap: ((_ destination: Place?) -> Void)?
+
     private let appointmentID: String
     private let getAppointmentDetailUseCase: GetAppointmentDetailUseCase
+    private var place: Place?
 
     init(appointmentID: String, getAppointmentDetailUseCase: GetAppointmentDetailUseCase) {
         self.appointmentID = appointmentID
@@ -48,10 +52,11 @@ final class AppointmentRouteViewModel {
     }
 
     func changeRouteTapped() {
-        print("경로 변경 버튼 탭")
+        onChangeRouteTap?(place)
     }
 
     private func apply(appointment: Appointment, currentUserID: String) {
+        place = appointment.place
         placeName = appointment.place?.name
         placeCoordinate = appointment.place?.coordinate
 
diff --git a/WhereAreYou/WhereAreYou/Presentation/Map/PlaceSelection/PlaceSelectionViewController.swift b/WhereAreYou/WhereAreYou/Presentation/Map/PlaceSelection/PlaceSelectionViewController.swift
index 0fcc8f4..23956c6 100644
--- a/WhereAreYou/WhereAreYou/Presentation/Map/PlaceSelection/PlaceSelectionViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/Map/PlaceSelection/PlaceSelectionViewController.swift
@@ -244,7 +244,7 @@ final class PlaceSelectionViewController: UIViewController {
         let searchPlaceViewController = SearchPlaceCardViewController(
             viewModel: SearchPlaceCardViewModel(
                 searchPlacesUseCase: SearchPlacesUseCase(
-                    repository: MockPlaceSearchRepository()
+                    repository: DIContainer.shared.resolve(PlaceSearchRepository.self)
                 )
             ),
             selectionButtonTitle: "선택하기",
diff --git a/WhereAreYou/WhereAreYou/Presentation/MyPage/MyPageViewController.swift b/WhereAreYou/WhereAreYou/Presentation/MyPage/MyPageViewController.swift
index b361262..28891ba 100644
--- a/WhereAreYou/WhereAreYou/Presentation/MyPage/MyPageViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/MyPage/MyPageViewController.swift
@@ -13,7 +13,7 @@ final class MyPageViewController: UIViewController {
 
     private let viewModel = MyPageViewModel(
         observeLocationPermissionUseCase: ObserveLocationPermissionUseCase(
-            repository: CoreLocationRepository()
+            repository: DIContainer.shared.resolve(LocationPermissionRepository.self)
         )
     )
 
diff --git a/WhereAreYou/WhereAreYou/Presentation/PresentationModel/ChatBubbleItem.swift b/WhereAreYou/WhereAreYou/Presentation/PresentationModel/ChatBubbleItem.swift
index ea81b72..fc0b128 100644
--- a/WhereAreYou/WhereAreYou/Presentation/PresentationModel/ChatBubbleItem.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/PresentationModel/ChatBubbleItem.swift
@@ -19,11 +19,26 @@ struct ChatBubbleItem: Sendable {
     let contentType: BubbleContentType
 
     /// `nonisolated extension ChatBubbleItem: Hashable`의 `==`에서 비교되므로
-    /// 합성 Equatable/Hashable 준수도 nonisolated여야 한다.
-    nonisolated enum BubbleContentType: Hashable, Sendable {
+    /// 합성 Equatable 준수도 nonisolated여야 한다.
+    nonisolated enum BubbleContentType: Sendable {
         case text
-        case locationShare
-        case placeShare(placeName: String, placeAddress: String, isDuplicate: Bool)
+        case locationShare(coordinate: Coordinate)
+        case placeShare(placeName: String, placeAddress: String, coordinate: Coordinate, isDuplicate: Bool)
+    }
+}
+
+nonisolated extension ChatBubbleItem.BubbleContentType: Equatable {
+    static func == (lhs: ChatBubbleItem.BubbleContentType, rhs: ChatBubbleItem.BubbleContentType) -> Bool {
+        switch (lhs, rhs) {
+        case (.text, .text):
+            return true
+        case (.locationShare, .locationShare):
+            return true
+        case (.placeShare(let lName, let lAddress, _, let lDuplicate), .placeShare(let rName, let rAddress, _, let rDuplicate)):
+            return lName == rName && lAddress == rAddress && lDuplicate == rDuplicate
+        default:
+            return false
+        }
     }
 }
 
diff --git a/WhereAreYou/WhereAreYou/Presentation/RouteSearch/RouteSearchViewController.swift b/WhereAreYou/WhereAreYou/Presentation/RouteSearch/RouteSearchViewController.swift
index ebbc643..b016446 100644
--- a/WhereAreYou/WhereAreYou/Presentation/RouteSearch/RouteSearchViewController.swift
+++ b/WhereAreYou/WhereAreYou/Presentation/RouteSearch/RouteSearchViewController.swift
@@ -125,6 +125,9 @@ final class RouteSearchViewController: UIViewController {
     private let initialDeparture: Place?
     private let initialDestination: Place?
 
+    /// 경로 선택 완료 시 호출
+    var onRouteSelected: (() -> Void)?
+
     init(viewModel: RouteSearchViewModel, departure: Place? = nil, destination: Place? = nil) {
         self.viewModel = viewModel
         self.initialDeparture = departure
@@ -142,12 +145,26 @@ final class RouteSearchViewController: UIViewController {
         super.viewDidLoad()
         view.backgroundColor = .pointBackground
         title = "경로 검색"
+        setUpNavigationBar()
         setUpLayout()
         setUpActions()
         bindViewModel()
         setUpInitialPlaces()
     }
 
+    private func setUpNavigationBar() {
+        guard presentingViewController != nil else { return }
+        let closeItem = UIBarButtonItem(
+            image: UIImage(systemName: "xmark"), style: .plain, target: self, action: #selector(closeTapped)
+        )
+        closeItem.tintColor = .secondaryLabel
+        navigationItem.leftBarButtonItem = closeItem
+    }
+
+    @objc private func closeTapped() {
+        presentingViewController?.dismiss(animated: true)
+    }
+
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
         viewModel.setDepartureTime(Date())
@@ -289,8 +306,8 @@ final class RouteSearchViewController: UIViewController {
             self?.presentTimePicker()
         }, for: .touchUpInside)
 
-        selectRouteButton.addAction(UIAction { _ in
-            print("경로 선택 tapped")
+        selectRouteButton.addAction(UIAction { [weak self] _ in
+            self?.onRouteSelected?()
         }, for: .touchUpInside)
     }
 
@@ -384,8 +401,7 @@ final class RouteSearchViewController: UIViewController {
         placeSearchTarget = target
 
         let buttonTitle = target == .departure ? "출발지로" : "도착지로"
-        // TODO: DIContainer로 대체
-        let searchPlacesUseCase = SearchPlacesUseCase(repository: MockPlaceSearchRepository())
+        let searchPlacesUseCase = SearchPlacesUseCase(repository: DIContainer.shared.resolve(PlaceSearchRepository.self))
         let searchViewModel = SearchPlaceCardViewModel(searchPlacesUseCase: searchPlacesUseCase)
         let searchVC = SearchPlaceCardViewController(
             viewModel: searchViewModel,