The invention discloses a message delivery system and message delivery method based on multiple clusters. The method comprises: a message server receiving pending task messages; the message server sending the task messages to at least one corresponding server cluster according to message types; and the server cluster delivering the task messages to a server node for processing. According to the invention, the message server collects all pending task messages, and sends the task messages according to subscription of each server cluster; and the server cluster delivers the task messages to corresponding server nodes in a point to point mode, thereby sending a large quantity of messages to corresponding nodes without redundancy or omission for message processing, and increasing message processing efficiency and speed.