diff --git a/src/main/java/com/kimgo/wepush/controller/SMSController.java b/src/main/java/com/kimgo/wepush/controller/SMSController.java
index 8d033ee..caf9c88 100644
--- a/src/main/java/com/kimgo/wepush/controller/SMSController.java
+++ b/src/main/java/com/kimgo/wepush/controller/SMSController.java
@@ -25,6 +25,9 @@ public class SMSController {
         if(accessToken == null){
             return ServerResponseEntity.fail("accessToken cannot be empty.");
         }
+        if (!smsInfo.isNullString()){
+            return ServerResponseEntity.fail("json body value error.");
+        }
         if (smsInfo == null || !smsInfo.validateFields()) {
             return ServerResponseEntity.fail("SMS info fields must not be blank.");
         }