With the steady progress of the construction of a unified national electricity market system, the further deepening of electricity marketization reform, the comprehensive opening of electricity generation and consumption plans, and the gradual formation of a multi-level market with time and space dimensions. However, the market framework of “unified market and two-level operation” has put forward higher requirements for system applications in terms of centralized and efficient management of market data and collaborative operation of applications. The current decentralized deployment of applications is no longer sufficient to support it. Therefore, a cloud architecture construction plan for the inter provincial power spot market subsystem has been proposed. This article conducts research on key technologies of power spot based on cloud computing technology, achieving a system architecture with high security of data exchange and reliable data transmission for power spot efficiency under cloud architecture.