Cold and heat recycling method and system based on energy consumption monitoring

The method comprises the following steps: by reading, collecting and storing related data of operation of an air conditioning unit system and a domestic hot water unit system, establishing a function relationship between outdoor temperature and the power consumption of an air conditioning unit and a function relationship between the outdoor temperature and the refrigerating capacity of the air conditioning unit; the water consumption condition of domestic hot water is obtained; the flow of a circulating pump of an air conditioner cooling tower is controlled, the water temperature of a standard condenser is adjusted by adjusting the amount of water entering the cooling tower, and the heat recovery water temperature is adjusted; starting and stopping of an air energy heat pump unit and a heat pump circulating pump of the hot water system are controlled, the required operation time of the air energy heat pump unit and the heat pump circulating pump is controlled, and it is ensured that domestic hot water is heat