diff --git a/agent/component/base.py b/agent/component/base.py
index 15b3c345e..e50b297de 100644
--- a/agent/component/base.py
+++ b/agent/component/base.py
@@ -46,6 +46,9 @@ class ComponentParamBase(ABC):
 
     def check(self):
         raise NotImplementedError("Parameter Object should be checked.")
+    
+    def output(self):
+        return None
 
     @classmethod
     def _get_or_init_deprecated_params_set(cls):