Cloud storage service is derivative products of cloud computing intended to provide an effective solution for mass data storage networks, while save storage costs and system resources. It can provide a complete backup, disaster recovery data center, in order to ensure data security, fault tolerance and efficient storage functions. At present, cloud disaster recovery models are using virtualization technology, which relies on the local server implementations. This paper introduces a model of DHT-based cloud disaster recovery, which is applicable to WAN universal data-level disaster recovery. Finally, in order to verify the feasibility of the model, the scheme is simulated in the cloud computing cluster.