diff --git a/doc/INFERENCE_TO_SERVING.md b/doc/INFERENCE_TO_SERVING.md
index e10ee976fb455c8cc49a0d5fa44ed4cc1f300ba9..719aa63c0a9b408d6bff628e7be4f35dfb49c5c8 100644
--- a/doc/INFERENCE_TO_SERVING.md
+++ b/doc/INFERENCE_TO_SERVING.md
@@ -24,13 +24,13 @@ inference_model_dir = "your_inference_model"
 serving_client_dir = "serving_client_dir"
 serving_server_dir = "serving_server_dir"
 feed_var_names, fetch_var_names = inference_model_to_serving(
-		inference_model_dir, serving_client_dir, serving_server_dir)
+		inference_model_dir, serving_server_dir, serving_client_dir)
 ```
 
 if your model file and params file are both standalone, please use the following api.
 
 ```
 feed_var_names, fetch_var_names = inference_model_to_serving(
-		inference_model_dir, serving_client_dir, serving_server_dir,
+		inference_model_dir, serving_server_dir, serving_client_dir,
 		model_filename="model", params_filename="params")
 ```
diff --git a/doc/INFERENCE_TO_SERVING_CN.md b/doc/INFERENCE_TO_SERVING_CN.md
index e7e909ac04be3b1a0885b3390d99a153dfbd170e..5d783f25a3f367baa94d471e50f227d9e6f733d1 100644
--- a/doc/INFERENCE_TO_SERVING_CN.md
+++ b/doc/INFERENCE_TO_SERVING_CN.md
@@ -23,11 +23,11 @@ inference_model_dir = "your_inference_model"
 serving_client_dir = "serving_client_dir"
 serving_server_dir = "serving_server_dir"
 feed_var_names, fetch_var_names = inference_model_to_serving(
-		inference_model_dir, serving_client_dir, serving_server_dir)
+		inference_model_dir, serving_server_dir, serving_client_dir)
 ```
 如果模型中有模型描述文件`model_filename` 和 模型参数文件`params_filename`，那么请用
 ```
 feed_var_names, fetch_var_names = inference_model_to_serving(
-		inference_model_dir, serving_client_dir, serving_server_dir,
+		inference_model_dir, serving_server_dir, serving_client_dir,
 		 model_filename="model", params_filename="params")
 ```