diff --git a/app/src/main/java/com/xypower/mpapp/MainActivity.java b/app/src/main/java/com/xypower/mpapp/MainActivity.java
index 56f10311..bbbd46c1 100644
--- a/app/src/main/java/com/xypower/mpapp/MainActivity.java
+++ b/app/src/main/java/com/xypower/mpapp/MainActivity.java
@@ -248,10 +248,45 @@ public class MainActivity extends AppCompatActivity {
 
         this.binding.btnSaveCfg.setOnClickListener(new View.OnClickListener() {
             @Override
-            public void onClick(View view) {
+            public void onClick(final View view) {
+
+                MicroPhotoContext.AppConfig appCfg =  MicroPhotoContext.getMpAppConfig(getApplicationContext());
+
+                String protocolStr = MainActivity.this.binding.protocol.getSelectedItem().toString();
+                int protocol = MicroPhotoContext.DEFAULT_PROTOCOL;
+                String[] parts = protocolStr.split("-");
+                if (parts != null) {
+                    protocol = Integer.parseInt(parts[0]);
+                }
+
+                if (appCfg.protocol != protocol) {
+
+                    AlertDialog.Builder builder = new AlertDialog.Builder(view.getContext());
+                    builder.setTitle(R.string.confirm_change_protocol);
+                    builder.setMessage(R.string.confirm_change_protocol_text);
+                    builder.setCancelable(true);
+                    builder.setPositiveButton(R.string.btn_ok, new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialogInterface, int i) {
+                            dialogInterface.dismiss();
+
+                            retrieveAndSaveAppConfig();
+                            MicroPhotoContext.removeMpConfigFiles(getApplicationContext());
+                            MicroPhotoService.updateConfigs(MainActivity.this.getApplicationContext());
+                        }
+                    });
+                    builder.setNegativeButton(R.string.btn_cancel, new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialogInterface, int i) {
+                            dialogInterface.dismiss();
+                        }
+                    });
+                    builder.show();
+                } else {
+                    retrieveAndSaveAppConfig();
+                    MicroPhotoService.updateConfigs(MainActivity.this.getApplicationContext());
+                }
 
-                retrieveAndSaveAppConfig();
-                MicroPhotoService.updateConfigs(MainActivity.this.getApplicationContext());
             }
         });
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a41a205d..eeaa527c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -13,6 +13,9 @@
 
     <string name="confirm_reboot">重启设备</string>
     <string name="text_confirm_reboot">确认重启设备吗？</string>
+    <string name="confirm_change_protocol">修改规约</string>
+    <string name="confirm_change_protocol_text">修改规约后，图像参数、采样参数、拍照时间表、短视频参数将被清除，确认要修改吗？</string>
+
 
     <string name="activity_channel_title">通道设置</string>
     <string name="osd_left_top">左上 OSD</string>
diff --git a/common/src/main/java/com/xypower/common/FileUtils.java b/common/src/main/java/com/xypower/common/FileUtils.java
index 6664ce0a..62367094 100644
--- a/common/src/main/java/com/xypower/common/FileUtils.java
+++ b/common/src/main/java/com/xypower/common/FileUtils.java
@@ -39,4 +39,21 @@ public class FileUtils {
         return true;
     }
 
+    public static boolean DeleteFilesInPath(String path) {
+        File pathFile = new File(path);
+        if (!pathFile.exists() || !pathFile.isDirectory()) {
+            return false;
+        }
+
+        for (File f : pathFile.listFiles()) {
+            if (!f.isFile()) {
+                continue;
+            }
+
+            f.delete();
+        }
+
+        return true;
+    }
+
 }
diff --git a/common/src/main/java/com/xypower/common/MicroPhotoContext.java b/common/src/main/java/com/xypower/common/MicroPhotoContext.java
index 33e465c8..79e28d82 100644
--- a/common/src/main/java/com/xypower/common/MicroPhotoContext.java
+++ b/common/src/main/java/com/xypower/common/MicroPhotoContext.java
@@ -140,6 +140,30 @@ public class MicroPhotoContext {
         return path;
     }
 
+    public static void removeMpConfigFiles(Context context) {
+        String appPath = buildMpAppDir(context);
+
+        File path = new File(appPath + "data/imgparams/");
+        if (path.exists() && path.isDirectory()) {
+            FileUtils.DeleteFilesInPath(path.getAbsolutePath());
+        }
+
+        path = new File(appPath + "data/schedules/");
+        if (path.exists() && path.isDirectory()) {
+            FileUtils.DeleteFilesInPath(path.getAbsolutePath());
+        }
+
+        path = new File(appPath + "data/videoparams/");
+        if (path.exists() && path.isDirectory()) {
+            FileUtils.DeleteFilesInPath(path.getAbsolutePath());
+        }
+
+        path = new File(appPath + "data/sampling");
+        if (path.exists() && path.isFile()) {
+            path.delete();
+        }
+    }
+
     public static String buildMpAppDir(Context contxt) {
 
         String path = Environment.getExternalStorageDirectory().getAbsolutePath();