diff --git a/docs/frequently-asked-questions.md b/docs/frequently-asked-questions.md
index 3c2ec6057..e8054484d 100644
--- a/docs/frequently-asked-questions.md
+++ b/docs/frequently-asked-questions.md
@@ -11,4 +11,12 @@ Both of them are used to hold the propagation declaration, but they have differe
 
 ## What is the difference between 'Push' and 'Pull' mode of a cluster?
 
-Please refer to [Overview of Push and Pull](./userguide/cluster-registration.md#overview-of-cluster-mode).
\ No newline at end of file
+Please refer to [Overview of Push and Pull](./userguide/cluster-registration.md#overview-of-cluster-mode).
+
+## Why Karmada requires `kube-controller-manager`?
+
+`kube-controller-manager` is composed of a bunch of controllers, Karmada inherits some controllers from it 
+to keep a consistent user experience and behavior. 
+
+It's worth noting that not all controllers are needed by Karmada, for the recommended controllers please
+refer to [Recommended Controllers](./userguide/configure-controllers.md#recommended-controllers).