diff --git a/src/configService.py b/src/configService.py
index c7481b332770880c75b4448ae5dfb9b618ec8198..ad73f3a5361b6de0a6dce810cc45cac549a3d468 100644
--- a/src/configService.py
+++ b/src/configService.py
@@ -18,6 +18,13 @@ class ConfigService:
         if not os.path.isfile(config_path):
             print("config_path not found, switch failed.")
             return
+        contents = self.tool.read_file(config_file)
+        # keys should contains in config
+        keys = ["DOWNLOAD","DEPENDENCY","ENV","APP","BUILD","RUN"]
+        for key in keys:
+            if f"[{key}]" not in contents:
+                print(f"key [{key}] not found in {config_file}, switch failed.")
+                return
         self.tool.write_file(self.meta_path, config_file.strip())
         print("Successfully switched. config file saved in file .meta")
 
diff --git a/src/toolService.py b/src/toolService.py
index 0942dfcec8df7807509f190b34a835d498e40bfc..0cb256700c82218b59f7b6c30772456dccc31ae5 100644
--- a/src/toolService.py
+++ b/src/toolService.py
@@ -42,6 +42,12 @@ class ToolService:
         with open(filename, 'w') as f:
             f.write(content)
 
+    def del_file(self, filepath):
+        """
+        删除文件。
+        """
+        if os.path.exists(filepath):
+            os.remove(filepath)
 
     def mkdirs(self, path):
         """
@@ -66,4 +72,4 @@ class ToolService:
             response = requests.get(url, stream=True)
             return response.status_code == 200
         except requests.exceptions.RequestException as e:
-            return False
\ No newline at end of file
+            return False