The invention discloses a cluster management method and device. The cluster management method includes the steps that a user is established according to management nodes; user information is synchronized to a node where a shared disk of clusters is located; a disk quota is set for the shared disk; the user information is synchronized to a preassigned node. Through the method, a local disk quota management strategy can be supported besides an overall disk quota management strategy, user disk quota can be set individually on an assigned node, and therefore the flexibility of a systematic management method is greatly enhanced.