Heat exchange control method and device of water heater

The heat exchange control method comprises the steps that when water outlet information of a water outlet pipeline shows that the water heater meets the heating confirmation condition, heat exchange control parameters of a power pump corresponding to a circulation pipeline of the water heater are generated, and the circulation pipeline is used for connecting a heat exchanger and a storage container to form a circulation loop; the storage container is used for storing a heat supply circulating medium; and a power pump is controlled to work according to the heat exchange control parameters, so that the power pump drives the heat supply circulation medium to flow in the circulation loop and transfer heat to tap water in the heat exchanger. It can be seen that the power pump can be controlled to guide the heat supply circulating medium into the heat exchanger to supply heat to tap water through the outlet water flow and the outlet water temperature, the heating efficiency of the water heater and the efficiency of