diff --git a/client/ios/Runner.xcodeproj/project.pbxproj b/client/ios/Runner.xcodeproj/project.pbxproj
index bffaa903..d223de01 100644
--- a/client/ios/Runner.xcodeproj/project.pbxproj
+++ b/client/ios/Runner.xcodeproj/project.pbxproj
@@ -536,4 +536,4 @@
 /* End XCConfigurationList section */
 	};
 	rootObject = 97C146E61CF9000F007C117D /* Project object */;
-}
\ No newline at end of file
+}
diff --git a/client/lib/main.dart b/client/lib/main.dart
index e8ec8797..92d92384 100644
--- a/client/lib/main.dart
+++ b/client/lib/main.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:pr12er/service.dart';
+import 'package:pr12er/sort_preference.dart';
 import 'package:pr12er/view_models/view_model_videos.dart';
 import 'package:provider/provider.dart';
 
@@ -18,7 +19,10 @@ void main() => runApp(MultiProvider(providers: [
       ),
       ChangeNotifierProvider<FavoriteVideoViewModel>(
         create: (context) => FavoriteVideoViewModel(),
-      )
+      ),
+      ChangeNotifierProvider(
+        create: (context) => SortMode(),
+      ),
     ], child: const MainApp()));
 
 class MainApp extends StatelessWidget {
diff --git a/client/lib/screens/main_screen.dart b/client/lib/screens/main_screen.dart
index 6120ca41..fd646730 100644
--- a/client/lib/screens/main_screen.dart
+++ b/client/lib/screens/main_screen.dart
@@ -4,6 +4,7 @@ import 'package:provider/provider.dart';
 
 import '../protos/pkg/pr12er/messages.pb.dart';
 import '../service.dart';
+import '../sort_preference.dart';
 import '../widgets/components/custom_app_bar.dart';
 import '../widgets/components/custom_bottom_navigation_bar.dart';
 import '../widgets/main/main_screen_favorite_view.dart';
@@ -37,25 +38,33 @@ class _MainScreenState extends State<MainScreen> {
               .where((video) => video.hasTitle() && video.hasLink())
               .toList();
 
-          return Scaffold(
-              appBar: CustomAppBar(
-                videoSearchDelegate: videoSearchDelegate,
-                context: context,
-                title: appName,
-              ),
-              body: IndexedStack(
-                index: _selectedBottomNavIndex,
-                children: [
-                  MainScreenListView(cleanList: cleanList),
-                  MainScreenFavoriteView(cleanList: cleanList)
-                ],
-              ),
-              bottomNavigationBar: CustomBottomNavigationBar(
-                  selectedBottomNavIndex: _selectedBottomNavIndex,
-                  onTap: (index) => setState(() {
-                        _selectedBottomNavIndex = index;
-                        videoSearchDelegate.showOnlyBookmarkItems = index == 1;
-                      })));
+          return Consumer<SortMode>(
+              builder: (context, sort, _child) => Scaffold(
+                  appBar: CustomAppBar(
+                    videoSearchDelegate: videoSearchDelegate,
+                    context: context,
+                    title: appName,
+                  ),
+                  body: IndexedStack(
+                    index: _selectedBottomNavIndex,
+                    children: [
+                      MainScreenListView(
+                          cleanList: sort.isDescOrder
+                              ? cleanList
+                              : List.from(cleanList.reversed)),
+                      MainScreenFavoriteView(
+                          cleanList: sort.isDescOrder
+                              ? cleanList
+                              : List.from(cleanList.reversed))
+                    ],
+                  ),
+                  bottomNavigationBar: CustomBottomNavigationBar(
+                      selectedBottomNavIndex: _selectedBottomNavIndex,
+                      onTap: (index) => setState(() {
+                            _selectedBottomNavIndex = index;
+                            videoSearchDelegate.showOnlyBookmarkItems =
+                                index == 1;
+                          }))));
         });
   }
 }
diff --git a/client/lib/sort_preference.dart b/client/lib/sort_preference.dart
new file mode 100644
index 00000000..5714729a
--- /dev/null
+++ b/client/lib/sort_preference.dart
@@ -0,0 +1,43 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+const _sharedPreferenceSortModeKey = "isDescOrder";
+
+class SortMode extends ChangeNotifier {
+  bool _isDescOrder = false;
+
+  bool get isDescOrder {
+    return _isDescOrder;
+  }
+
+  /// sharedPreferences is only visible for testing.
+  /// It is used to test isDarkMode is being loaded from SharedPreferences.
+  @visibleForTesting
+  Future<SharedPreferences> get sharedPreferences =>
+      SharedPreferences.getInstance();
+
+  void toggleMode() {
+    _isDescOrder = !_isDescOrder;
+    SharedPreferences.getInstance().then(
+        (pref) => pref.setBool(_sharedPreferenceSortModeKey, _isDescOrder));
+    notifyListeners();
+  }
+
+  // This type should not be a widget(e.g. Icon) because of mockito support...
+  IconData get icon =>
+      _isDescOrder ? Icons.vertical_align_top : Icons.vertical_align_bottom;
+
+  // This type should not be a widget(e.g. Text) because of mockito support...
+  String get text => _isDescOrder ? "오름차순으로" : "내림차순으로";
+
+  SortMode() {
+    SharedPreferences.getInstance().then((pref) {
+      final isDescOrder = pref.getBool(_sharedPreferenceSortModeKey);
+      if (isDescOrder != null) {
+        _isDescOrder = isDescOrder;
+        notifyListeners();
+      }
+    });
+  }
+}
diff --git a/client/lib/widgets/components/custom_app_bar.dart b/client/lib/widgets/components/custom_app_bar.dart
index 56283400..e72e22ed 100644
--- a/client/lib/widgets/components/custom_app_bar.dart
+++ b/client/lib/widgets/components/custom_app_bar.dart
@@ -1,11 +1,12 @@
 import 'package:flutter/material.dart';
 import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 import 'package:pr12er/custom_theme.dart';
+import 'package:pr12er/sort_preference.dart';
 import 'package:pr12er/widgets/main/report.dart';
 import 'package:pr12er/widgets/main/video_search_delegate.dart';
 import 'package:provider/provider.dart';
 
-enum VertMenu { themeMode, issueReport }
+enum VertMenu { themeMode, sortMode, issueReport }
 
 class CustomAppBar extends AppBar {
   CustomAppBar({
@@ -36,6 +37,13 @@ class CustomAppBar extends AppBar {
                         leading: Icon(context.read<CustomTheme>().icon),
                         title: Text(context.read<CustomTheme>().text))),
                 const PopupMenuDivider(height: 5),
+                PopupMenuItem<VertMenu>(
+                    key: const ValueKey("icon-sort-toggle-button"),
+                    value: VertMenu.sortMode,
+                    child: ListTile(
+                        leading: Icon(context.read<SortMode>().icon),
+                        title: Text(context.read<SortMode>().text))),
+                const PopupMenuDivider(height: 5),
                 const PopupMenuItem<VertMenu>(
                     key: ValueKey("popup-menu-item-issue-report"),
                     value: VertMenu.issueReport,
@@ -50,6 +58,9 @@ class CustomAppBar extends AppBar {
                   case VertMenu.themeMode:
                     context.read<CustomTheme>().toggleMode();
                     break;
+                  case VertMenu.sortMode:
+                    context.read<SortMode>().toggleMode();
+                    break;
                   case VertMenu.issueReport:
                     showMaterialModalBottomSheet(
                         context: context,
diff --git a/client/test/screens/main_screen_with_mocks_test.dart b/client/test/screens/main_screen_with_mocks_test.dart
index 6e3b1337..f0f021c9 100644
--- a/client/test/screens/main_screen_with_mocks_test.dart
+++ b/client/test/screens/main_screen_with_mocks_test.dart
@@ -6,6 +6,7 @@ import 'package:pr12er/custom_theme.dart';
 import 'package:pr12er/protos/pkg/pr12er/messages.pb.dart';
 import 'package:pr12er/screens/main_screen.dart';
 import 'package:pr12er/service.dart';
+import 'package:pr12er/sort_preference.dart';
 import 'package:pr12er/view_models/view_model_videos.dart';
 import 'package:provider/provider.dart';
 
@@ -112,6 +113,9 @@ MultiProvider wrapWithProviders(
       ChangeNotifierProvider<CustomTheme>(create: (context) => mockCustomTheme),
       ChangeNotifierProvider<FavoriteVideoViewModel>(
           create: (context) => mockFavoriteVideoViewModel),
+      ChangeNotifierProvider<SortMode>(
+        create: (context) => SortMode(),
+      )
     ],
     builder: (context, child) => MaterialApp(home: MainScreen()),
   );