Vehicle, and vehicle-mounted air conditioner control method and system

The invention provides a vehicle, and a vehicle-mounted air conditioner control method and system, and belongs to the technical field of vehicle-mounted air conditioner control. The control method comprises the steps that the actual load rate of an engine is detected; when the actual load rate of the engine is larger than or equal to a preset high load rate threshold value, the in-vehicle temperature is detected, and when the in-vehicle temperature is larger than a first temperature threshold value and smaller than or equal to a comfort degree upper limit temperature threshold value, the air conditioner is controlled to enter a running stopping state; when the actual load rate of the engine is smaller than the high load rate threshold value, the in-vehicle temperature is detected, and whenthe in-vehicle temperature is larger than a second temperature threshold value, the air conditioner is controlled to enter an operation state; and when the in-vehicle temperature is smaller than or equal to the second temperature threshold value, the air conditioner is controlled to enter the operation stopping state. According to the control method, the actual load rate of the engine is introduced to serve as the control condition of the vehicle-mounted air conditioner, the balance between the vehicle dynamic property and the in-vehicle temperature comfort is achieved, and the vehicle dynamic property and the in-vehicle temperature comfort are both considered.