Method and device for controlling air conditioner and air conditioner

The invention relates to the technical field of air conditioner control, and discloses a method for controlling an air conditioner, which comprises the following steps: acquiring scene reference information corresponding to a target scene collected by a millimeter wave radar; determining a target load adjusting scheme of the air conditioner according to the scene reference information; and controlling the air conditioner to execute the target load adjusting scheme. Thus, the refrigerating capacity demand of the user in the current scene can be determined in combination with the scene reference information collected by the millimeter wave radar, and the target load adjustment scheme meeting the refrigerating capacity demand is determined, so that the air conditioner load is controlled more intelligently under the condition that the air conditioner is controlled to execute the target load adjustment scheme, and the user experience is improved. And the load adjustment requirement of the user in the target scene