The air conditioning flexible control protocol conversion gateway is an intelligent device that can collect the electricity consumption information of the central air conditioner and intelligently control its operation. It realizes the fine management of the central air-conditioning system through the docking with the central air-conditioning unit (mainly composed of compressor, condenser, throttling device and evaporator). The central air-conditioning unit uses the principle of reverse Carnot cycle to produce chilled water or heating water to regulate the indoor temperature. The flexible control strategy is based on the operation characteristics of the air conditioning system itself, and by adjusting the operating load, the system can not only meet the needs of the indoor environment, but also participate in the demand response of the power grid, so as to improve energy efficiency, reduce operating costs, and contribute to the stable operation of the power grid.