Abstract: Aiming at the problems of single planning technology and few resource types in the existing integrated energy system planning, a two-stage optimization model of planning and operation was established by constructing a regional integrated energy system planning and operation optimization model, and the integrated energy system was optimized by means of particle swarm optimization to obtain the system equipment optimal configuration. The simulation results showed that compared with the traditional energy supply system, the regional integrated energy system constructed in this paper had the lowest annual total operating cost and the best economy.