Abstract: Blockchain is expected to play an important role in the energy system under the development trend of cross-regional interconnection, multi-energy complementarity and data interflow in the energy industry. First, starting from the value of blockchain, this paper presents the application value of blockchain in the energy industry and discusses the applicability of public blockchain, consortium blockchain and private blockchain in the energy industry. Four application scenarios and the corresponding applications of blockchain in the energy industry are summarized. Then, this paper introduces the mainstream energy blockchain platform, and expounds the differences of blockchain platforms in technology architecture. Finally, some suggestions on the development of energy blockchain are put forward.