Blockchain is a distributed information sharing database system integrated by the ordered blocks according to encryption algorithm and consensus mechanism. To promote intelligence and efficiency, this paper reviews the blockchain technique applied for modeling the framework and typical applications in the cloud energy storage power system. The concepts about the blockchain, cloud computing, virtual power plant and cloud energy storage (CES) in the power system are introduced firstly. This paper presents a framework design and its function modules for Guangdong power grid's future CES modules using blockchain technique based on identifying and discussing various important literature about the multi-energy systems integration, end-user demand response and distributed energy transaction.