METHOD FOR CONTROLLING VEHICLE AIR-CONDITIONING SYSTEM, AND VEHICLE AIR-CONDITIONING SYSTEM

Disclosed are a method for controlling a vehicle air-conditioning system, and a vehicle air-conditioning system. The method comprises: acquiring an actual degree of superheat, a preset degree of superheat and a degree of opening of an electronic expansion valve; and according to the actual degree of superheat, the preset degree of superheat and the degree of opening of the electronic expansion valve, judging whether the electronic expansion valve is in a fault state or not; if yes, outputting a control signal to an executive control mechanism to enable same to adjust a parameter of a device in a vehicle air-conditioning system which influences the variation of the actual degree of superheat, so as to adjust the degree of superheat of the vehicle air-conditioning system.