Blockchain is an important supporting technology for new information infrastructure and it is widely used in power system. According to the requirements of decentralization and trusted data exchange in power system application scenarios, the adaptability and technical architecture of power blockchain technology are analyzed. On this basis, the construction principles and specifications of blockchain technology facilities are discussed from the aspects of construction requirements, high availability of computing resources, distributed storage, multi plane network and service-oriented platform. In terms of computing resources, the design method of high-performance self-organizing blockchain all-in-one machine is proposed. In terms of network resources, a multi-plane architecture of blockchain data center in business plane, storage plane and management plane is proposed. In the aspect of service-oriented middle platform, a three-tier management system of resource management layer, blockchain management layer and platform management layer is proposed. The last but not the least, the feasibility of the research content is verified through the power information security supervision and management system.