Abstract: Although “energy transition” is under way worldwide, fossil fuel still accounts for dominant position of global energy consumption at present. Therefore, how to effectively integrate renewable energy and conventional energy appears to be particularly important. In this paper, the precise model of the air conditioning and refrigeration sectors is built for the combined cooling heating and power system (CCHP) with solar air conditioning. The operation status of each component in CCHP system is discussed separately with respect to such three indexes as operation cost, the consumption of fossil fuel and the emission of CO₂, and the AHP based weight calculation method is used to determine optimized objective that comprehensively consider above three indexes according to the importance of different indicators. In case analysis, the impact of main equipment configuration on system performance is discussed, the operation of combined system in real-time pricing environment is optimized, and controllable loads are arranged to realize orderly utilization of electricity.