In the environment of current electricity market, in addition to vigorously developing new energy, it is particularly important to reduce energy consumption and improve energy efficiency. In this environment, the energy consumption optimization system of commercial buildings is designed. Combined with the actual situation of energy consumption of commercial buildings, the technicalroute is improved, and the energy consumption control strategy of in-formation physical system of commercial buildings is analyzed and optimized. Unified access to the provincial smart energy service platform, energy consumption optimization and demand response strategies is generated through the platform and is distributed to the sideend for implementation. The mixed networking mode of general packet radio service wireless private network, local optical fiber and industrial Ethernet is adopted to ensure the safety and reliability of communication. Programmable logic controller cabinet realizes the optimal operation of single equipment through edge calculation, and can also operate in closed loop in case of network interruption. Various sensors and controllers are installed to monitor operation data inreal time and regulate operation status.