diff --git a/README.md b/README.md
index a474105..b0a07a4 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,10 @@ python -m mindsearch.app --lang en --model_format internlm_server --search_engin
 - `--search_engine`: Search engine.
   - `DuckDuckGoSearch` for search engine for DuckDuckGo.
   - `BingSearch` for Bing search engine.
+  - `BraveSearch` for Brave search web api engine.
+  - `GoogleSearch` for Google Serper web search api engine.
+  
+  Please set your Web Search engine API key as the `WEB_SEARCH_API_KEY` environment variable unless you are using `DuckDuckGo`.
 
 ### Step3: Setup MindSearch Frontend
 
@@ -100,25 +104,6 @@ python frontend/mindsearch_gradio.py
 streamlit run frontend/mindsearch_streamlit.py
 ```
 
-## 🌐 Change Web Search API
-
-To use a different type of web search API, modify the `searcher_type` attribute in the `searcher_cfg` located in `mindsearch/agent/__init__.py`. Currently supported web search APIs include:
-
-- `GoogleSearch`
-- `DuckDuckGoSearch`
-- `BraveSearch`
-- `BingSearch`
-
-For example, to change to the Brave Search API, you would configure it as follows:
-
-```python
-BingBrowser(
-    searcher_type='BraveSearch',
-    topk=2,
-    api_key=os.environ.get('BRAVE_API_KEY', 'YOUR BRAVE API')
-)
-```
-
 ## 🐞 Debug Locally
 
 ```bash
diff --git a/README_zh-CN.md b/README_zh-CN.md
index beca209..5aeb6f5 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -61,7 +61,12 @@ python -m mindsearch.app --lang en --model_format internlm_server --search_engin
     如果您想使用其他模型，请修改 [models](./mindsearch/agent/models.py)
 - `--search_engine`: 搜索引擎。
   - `DuckDuckGoSearch` 为 DuckDuckGo 搜索引擎。
-  - `BingSearch` 为 Bing搜索引擎。
+  - `BingSearch` 为 Bing 搜索引擎。
+  - `BraveSearch` 为 Brave 搜索引擎。
+  - `GoogleSearch` 为 Google Serper 搜索引擎。
+    
+  请将网页搜索引擎 API 密钥设置为 `WEB_SEARCH_API_KEY` 环境变量，如果使用的是 `DuckDuckGo`，则无需设置。
+ 
 ### 步骤3: 启动 MindSearch 前端
 
 提供以下几种前端界面：
diff --git a/mindsearch/agent/__init__.py b/mindsearch/agent/__init__.py
index 96044f0..22f070b 100644
--- a/mindsearch/agent/__init__.py
+++ b/mindsearch/agent/__init__.py
@@ -45,8 +45,8 @@ def init_agent(lang='cn', model_format='internlm_server',search_engine='DuckDuck
             plugin_executor=ActionExecutor(
                 BingBrowser(searcher_type=search_engine,
                             topk=6,
-                            api_key=os.environ.get('BING_API_KEY',
-                                                   'YOUR BING API'))),
+                            api_key=os.environ.get('WEB_SEARCH_API_KEY',
+                                                   'YOUR WEB SEARCH ENGINE API'))),
             protocol=MindSearchProtocol(
                 meta_prompt=datetime.now().strftime(
                     'The current date is %Y-%m-%d.'),