diff --git a/src/core/command/display.py b/src/core/command/display.py
index b8de6ef887efd77ee7d36add34a6c4974725d430..19cb00ec80f2a9e81e2e064a57fe2552f05b01c0 100644
--- a/src/core/command/display.py
+++ b/src/core/command/display.py
@@ -248,11 +248,11 @@ def display_help_info(para_list):
         print("This command is not support.")
         return
 
-    if len(para_list) > 1:
-        display_help_command_info(para_list[1])
-    else:
+    if para_list[1] == "empty":
         print(TOOL_VERSION_INFO)
         print(HLEP_COMMAND_INFOMATION)
+    else:
+        display_help_command_info(para_list[1])
 
 
 def display_show_info(para_list, productform):