diff --git a/AcaMate.xcodeproj/project.xcworkspace/xcuserdata/seankim.xcuserdatad/UserInterfaceState.xcuserstate b/AcaMate.xcodeproj/project.xcworkspace/xcuserdata/seankim.xcuserdatad/UserInterfaceState.xcuserstate
index bb10369..bcea3c4 100644
Binary files a/AcaMate.xcodeproj/project.xcworkspace/xcuserdata/seankim.xcuserdatad/UserInterfaceState.xcuserstate and b/AcaMate.xcodeproj/project.xcworkspace/xcuserdata/seankim.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/AcaMate/0. Setup/AppDelegate.swift b/AcaMate/0. Setup/AppDelegate.swift
index 91b7438..961b9d4 100644
--- a/AcaMate/0. Setup/AppDelegate.swift	
+++ b/AcaMate/0. Setup/AppDelegate.swift	
@@ -44,8 +44,8 @@ class AppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDele
         }
         center.delegate = self
         
-//MARK: - 네트워크 모니터 초기화
-//        _ = NetworkMonitor.shared
+        //MARK: - 네트워크 모니터 초기화
+        _ = NetworkMonitor.shared
         
         printLog("End Set AppDelegate")
         return true
diff --git a/AcaMate/1. View/0. Common/NavigationView.swift b/AcaMate/1. View/0. Common/NavigationView.swift
new file mode 100644
index 0000000..610011f
--- /dev/null
+++ b/AcaMate/1. View/0. Common/NavigationView.swift	
@@ -0,0 +1,84 @@
+//
+//  NavigationView.swift
+//  AcaMate
+//
+//  Created by Sean Kim on 12/12/24.
+//
+
+import SwiftUI
+import Combine
+
+
+
+struct NavigationView: View {
+    @State private var naviState : NaviState = .init(act: .NONE, path: .Intro)
+    @State private var history: [PathName] = [.Intro]
+
+    
+    var body: some View {
+        ZStack {
+            switch naviState.path {
+            case .NONE:
+                EmptyView()
+            case .Intro:
+                IntroView(naviState: $naviState)
+            case .Login :
+                LoginView(naviState: $naviState)
+            case .Main:
+                EmptyView()
+            }
+        }
+        .onChange(of: naviState) { old, new in
+            switch new.act {
+            case .NONE:
+                break
+            case .ADD:
+                addHistory(path: new.path)
+            case .POP:
+                popHistory()
+            case .RESET:
+                resetHistory(path: new.path)
+            case .MOVE:
+                moveHistory(path: new.path)
+            }
+            
+            // LOG
+            printLog("\(old.path) => \(new.path)")
+            showHistory()
+        }
+    }
+    
+    private func addHistory(path: PathName) {
+        history.append(path)
+    }
+    
+    private func popHistory() {
+        history.removeLast()
+        naviState.set(act: .NONE, path: history.last ?? .NONE)
+    }
+    
+    private func resetHistory(path: PathName) {
+        history.removeAll()
+        addHistory(path: path)
+    }
+    
+    private func moveHistory(path: PathName) {
+        if path == .NONE {
+            naviState.set(act: .RESET, path: history.first ?? .Main)
+        }
+        if history.contains(path) {
+            let remove = history.count - history.firstIndex(of: path)! - 1
+            history.removeLast(remove)
+            if remove > 0 {
+                naviState.set(act: .NONE, path: path)
+                return
+            }
+        }
+        naviState.set(act: .RESET, path: path)
+    }
+    
+    private func showHistory() {
+        printLog(history)
+    }
+    
+}
diff --git a/AcaMate/1. View/1. Intro & Login/IntroView.swift b/AcaMate/1. View/1. Intro & Login/IntroView.swift
index 47ad830..3ae437c 100644
--- a/AcaMate/1. View/1. Intro & Login/IntroView.swift	
+++ b/AcaMate/1. View/1. Intro & Login/IntroView.swift	
@@ -10,65 +10,67 @@ import Combine
 
 struct IntroView: View {
     @State var cancellables: Set<AnyCancellable> = []
+    @Binding var naviState : NaviState
     
     var body: some View {
-        NavigationStack {
-            VStack(spacing: 0) {
-                Spacer()
-                    .frame(height: 100)
+        VStack(spacing: 0) {
+            Spacer()
+                .frame(height: 100)
+            Image("Team_Icon")
+                .resizable()
+                .frame(width: 200, height: 200)
+                .background(.white)
+                .border(.black)
+                .padding()
+            Spacer()
+            HStack(spacing: 4) {
                 Image("Team_Icon")
                     .resizable()
-                    .frame(width: 200, height: 200)
-                    .background(.white)
-                    .border(.black)
-                    .padding()
-                Spacer()
-                HStack(spacing: 4) {
-                    Image("Team_Icon")
-                        .resizable()
-                        .frame(width: 24, height: 24)
-                    Text("STEIN")
-                        .font(.nps(font: .bold, size: 16))
-                        .foregroundStyle(Color(.Text.detail))
-                }
-                .padding(.bottom,12)
-                Text("Copyright © Team.Stein")
-                    .font(.nps(font: .regular, size: 14))
+                    .frame(width: 24, height: 24)
+                Text("STEIN")
+                    .font(.nps(font: .bold, size: 16))
                     .foregroundStyle(Color(.Text.detail))
-                    .padding(.bottom,50)
             }
-            .fullView(.Normal.normal)
-            .onAppear {
-                printLog("IntroView_onAppear")
-                loadVersion()
-                    .sink { completion in
-                        switch completion {
-                        case .failure(let error):
-                            printLog(error)
-                        case .finished: break
-                        }
-                    } receiveValue: { version in
-                        switch compareVersion(version.force_ver, currentVersion()){
+            .padding(.bottom,12)
+            Text("Copyright © Team.Stein")
+                .font(.nps(font: .regular, size: 14))
+                .foregroundStyle(Color(.Text.detail))
+                .padding(.bottom,50)
+        }
+        .fullView(.Normal.normal)
+        .onAppear {
+            printLog("IntroView_onAppear")
+            loadVersion()
+                .sink { completion in
+                    switch completion {
+                    case .failure(let error):
+                        printLog(error)
+                    case .finished: break
+                    }
+                } receiveValue: { version in
+                    switch compareVersion(version.force_ver, currentVersion()){
+                    case .bigger:
+                        printLog("강제 업데이트")
+                    default:
+                        switch compareVersion(version.final_ver, currentVersion()) {
                         case .bigger:
-                            printLog("강제 업데이트")
-                        default:
-                            switch compareVersion(version.final_ver, currentVersion()) {
-                            case .bigger:
-                                if version.choice_update_yn {
-                                    printLog("선택 업데이트")
-                                }
-                                else {
-                                    printLog("정상 동작")
-                                }
-                            default:
-                                printLog("선택 업데이트 넘어감")
+                            if version.choice_update_yn {
+                                printLog("선택 업데이트")
                             }
+                            else {
+                                printLog("정상 동작")
+                                naviState.set(act: .RESET, path: .Login)
+                            }
+                        default:
+                            printLog("선택 업데이트 넘어감")
+                            naviState.set(act: .MOVE, path: .Login)
+                            
                         }
                     }
-                    .store(in: &cancellables)
-                
-                
-            }
+                }
+                .store(in: &cancellables)
+            
+            
         }
     }
     
@@ -101,15 +103,15 @@ struct IntroView: View {
         return currentVer
         
     }
-
+    
     private func versionChange(ver: String) -> [Int] {
         return ver.components(separatedBy: ["."]).map {Int($0) ?? 0}
     }
-    
-    
-    
 }
 
-#Preview {
-    IntroView()
-}
+
+
+
+//#Preview {
+//    IntroView(path: $NavigationPath())
+//}
diff --git a/AcaMate/1. View/1. Intro & Login/LoginView.swift b/AcaMate/1. View/1. Intro & Login/LoginView.swift
index a3a119e..02758fd 100644
--- a/AcaMate/1. View/1. Intro & Login/LoginView.swift	
+++ b/AcaMate/1. View/1. Intro & Login/LoginView.swift	
@@ -8,6 +8,8 @@
 import SwiftUI
 
 struct LoginView: View {
+    @Binding var naviState : NaviState
+    
     var body: some View {
         VStack(spacing: 0) {
             Image("Team_Icon")
@@ -34,12 +36,18 @@ struct LoginView: View {
                 }
             }
             
-            
+            Button {
+                naviState.set(act: .MOVE,path: .Intro)
+            } label: {
+                Text("111111111")
+            }
+            .padding()
         }
         .fullView(.Normal.normal)
+        
     }
 }
 
-#Preview {
-    LoginView()
-}
+//#Preview {
+//    LoginView()
+//}
diff --git a/AcaMate/4. Model/Navigation.swift b/AcaMate/4. Model/Navigation.swift
new file mode 100644
index 0000000..3b974a9
--- /dev/null
+++ b/AcaMate/4. Model/Navigation.swift	
@@ -0,0 +1,47 @@
+//
+//  Navigation.swift
+//  AcaMate
+//
+//  Created by Sean Kim on 12/13/24.
+//
+
+import Foundation
+
+
+
+struct NaviState: Equatable {
+    var act: NaviAction
+    var path: PathName
+    
+    static func == (lhs: NaviState, rhs: NaviState) -> Bool {
+        return lhs.act == rhs.act && lhs.path == rhs.path
+    }
+    
+    mutating func set(act: NaviAction = .ADD, path: PathName = .NONE) {
+        self.act = act
+        self.path = path
+    }
+}
+
+enum NaviAction: Hashable {
+    /// 한 계층 추가
+    case ADD
+    /// 전체 삭제 후 추가
+    case RESET
+    /// 한 계층 빼기
+    case POP
+    /// 위치로 이동 (path == NONE인 경우 최상단)
+    case MOVE
+    /// 아무 동작 안함
+    case NONE
+    
+    /// FIRST = 가장 메인, MOVE = 그곳으로
+}
+
+enum PathName: Hashable {
+    case Intro
+    case Login
+    case Main
+    
+    case NONE
+}
diff --git a/AcaMate/5. Modifier/Network.swift b/AcaMate/5. Modifier/Network.swift
new file mode 100644
index 0000000..4b776c3
--- /dev/null
+++ b/AcaMate/5. Modifier/Network.swift	
@@ -0,0 +1,27 @@
+//
+//  Network.swift
+//  AcaMate
+//
+//  Created by Sean Kim on 12/10/24.
+//
+
+import Network
+import Combine
+
+class NetworkMonitor: ObservableObject {
+    static let shared = NetworkMonitor()
+
+    private let monitor = NWPathMonitor()
+    private let queue = DispatchQueue.global(qos: .background)
+    
+    @Published var isConnected: Bool = true
+    
+    private init() {
+        monitor.pathUpdateHandler = { [weak self] path in
+            DispatchQueue.main.async {
+                self?.isConnected = (path.status == .satisfied)
+            }
+        }
+        monitor.start(queue: queue)
+    }
+}
diff --git a/AcaMate/5. Modifier/View.swift b/AcaMate/5. Modifier/View.swift
index 3656f7b..285512e 100644
--- a/AcaMate/5. Modifier/View.swift	
+++ b/AcaMate/5. Modifier/View.swift	
@@ -6,9 +6,23 @@
 //
 
 import SwiftUI
+import Combine
+
+struct NetworkModifier: ViewModifier {
+    @ObservedObject private var networkMonitor = NetworkMonitor.shared
+    
+    func body(content: Content) -> some View {
+        content
+            .onChange(of: networkMonitor.isConnected) { _ , new in
+                if new {
+                    
+                }
+            }
+    }
+}
 
 extension View {
-    func fullView(_ backColor: Color) -> some View{
+    func fullView(_ backColor: Color) -> some View {
         return self
             .frame(maxWidth: .infinity, maxHeight: .infinity)
             .background(backColor)
@@ -17,4 +31,10 @@ extension View {
     func endTextEditing() {
             UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
     }
+    
+    func setNavigaion() -> some View {
+        self
+            .navigationBarBackButtonHidden(true)
+            .toolbar(.hidden, for: .navigationBar)
+    }
 }
diff --git a/AcaMate/AcaMateApp.swift b/AcaMate/AcaMateApp.swift
index 5454b18..812e58b 100644
--- a/AcaMate/AcaMateApp.swift
+++ b/AcaMate/AcaMateApp.swift
@@ -22,7 +22,7 @@ struct AcaMateApp: App {
     
     var body: some Scene {
         WindowGroup {
-            IntroView().onOpenURL { url in
+            NavigationView().onOpenURL { url in
                 if (AuthApi.isKakaoTalkLoginUrl(url)) {
                     _ = AuthController.handleOpenUrl(url: url)
                 }