Abstract: Aiming at the optimal configuration of integrated energy system with distributed generation,this paper puts forward a system configuration method based on energy supply reliability. The lack of load expectation considering the dynamic change of temperature after equipment failure is taken as the reliability index. This paper establishes the optimal configuration model of integrated energy system with cost,environmental protection and energy supply reliability,and uses the bi-level optimization algorithm combining adaptive particle swarm optimization and CPLEX to solve the problem. The example analysis shows that the configuration method can reduce the economic cost and improve the reliability of the system.