diff --git a/doc/hooks_chain.md b/doc/hooks_chain.md
deleted file mode 100644
index c6e1e165d..000000000
--- a/doc/hooks_chain.md
+++ /dev/null
@@ -1 +0,0 @@
-packet, message handler chain???
diff --git a/doc/topic.md b/doc/topic.md
deleted file mode 100644
index 90c694c08..000000000
--- a/doc/topic.md
+++ /dev/null
@@ -1,22 +0,0 @@
-Topic Types:
-
-static: 
-
-    /brokers/alerts/
-    /brokers/clients/connected
-    /brokers/clients/disconnected
-
-dynamic:
-    
-    created when subscribe...
-
-bridge:
-
-    cretated when bridge...
-
-
-## Create Topics
-
-emqttd_pubsub:create(Type, Name) 
-emqttd_pubsub:create(#topic{name = Name, node= node(), type = Type}).
-