Method and device for controlling water chilling unit, water chilling unit and storage medium

The invention relates to the technical field of intelligent household appliances, and discloses a method for controlling a water chilling unit, which comprises the following steps: acquiring an environment temperature value and a water temperature value of an inflow end of an on-off device; according to the environment temperature value, the operation state of the on-off device is controlled; and adjusting the operation states of the compressor and the fan unit according to the water temperature value. The running state of the water chilling unit is comprehensively adjusted according to the environment temperature value and the water temperature value, and therefore the energy efficiency ratio of the water chilling unit is effectively increased. And whether the operation state of the on-off device needs to be adjusted or not in the current environment is judged according to the environment temperature value, so that the water circulation loop and the refrigerant circulation loop interact, and the temperature