diff --git a/lib/photo_manager.dart b/lib/photo_manager.dart
index 58c5ae70..87238e9e 100644
--- a/lib/photo_manager.dart
+++ b/lib/photo_manager.dart
@@ -25,6 +25,7 @@ export 'src/internal/progress_handler.dart';
 export 'src/managers/caching_manager.dart';
 export 'src/managers/notify_manager.dart';
 export 'src/managers/photo_manager.dart';
+export 'src/managers/platform_delegate.dart';
 
 export 'src/types/entity.dart';
 export 'src/types/thumbnail.dart';
diff --git a/lib/src/managers/platform_delegate.dart b/lib/src/managers/platform_delegate.dart
new file mode 100644
index 00000000..bb19af88
--- /dev/null
+++ b/lib/src/managers/platform_delegate.dart
@@ -0,0 +1,24 @@
+/// The delegate for platform
+///
+/// Just inject some platform specific code.
+abstract class PMPlatformDelegate {
+  static bool _isHarmony = false;
+  static bool get isHarmony => _isHarmony;
+}
+
+/// The delegate have android, iOS and macOS implementation.
+class CommonDelegate extends PMPlatformDelegate {
+  /// Registers this class as the default platform implementation.
+  static void registerWith() {
+    // ignore: avoid_print
+    print('registerWith CommonDelegate for photo_manager');
+  }
+}
+
+/// The delegate for harmony
+class HarmonyDelegate extends PMPlatformDelegate {
+  /// Registers this class as the default platform implementation.
+  static void registerWith() {
+    PMPlatformDelegate._isHarmony = true;
+  }
+}
diff --git a/lib/src/utils/platform_utils.dart b/lib/src/utils/platform_utils.dart
new file mode 100644
index 00000000..45433db5
--- /dev/null
+++ b/lib/src/utils/platform_utils.dart
@@ -0,0 +1,21 @@
+import 'dart:io';
+
+import 'package:photo_manager/src/managers/platform_delegate.dart';
+
+/// A utility class to check the platform.
+class PlatformUtils {
+  /// The harmony must be injected by the platform delegate.
+  static bool get isOhos => PMPlatformDelegate.isHarmony;
+
+  /// Wrapper for [Platform.isAndroid].
+  static bool get isAndroid => Platform.isAndroid;
+
+  /// Wrapper for [Platform.isIOS].
+  static bool get isIOS => Platform.isIOS;
+
+  /// Wrapper for [Platform.isMacOS].
+  static bool get isMacOS => Platform.isMacOS;
+
+  /// If the platform is iOS or macOS, return true.
+  static bool get isDarwin => Platform.isMacOS || Platform.isIOS;
+}
diff --git a/pubspec.yaml b/pubspec.yaml
index 3e378e9e..d48287cd 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -22,7 +22,14 @@ flutter:
       android:
         package: com.fluttercandies.photo_manager
         pluginClass: PhotoManagerPlugin
+        dartPluginClass: CommonDelegate
       ios:
         pluginClass: PhotoManagerPlugin
+        dartPluginClass: CommonDelegate
       macos:
         pluginClass: PhotoManagerPlugin
+        dartPluginClass: CommonDelegate
+      ohos:
+        package: com.fluttercandies.photo_manager
+        pluginClass: PhotoManagerPlugin
+        dartPluginClass: HarmonyDelegate