Vehicle-mounted air conditioner internal and external circulation automatic control method and system based on vehicle detection

The invention provides a vehicle-mounted air conditioner internal and external circulation automatic control method based on vehicle detection, which comprises the following steps: step S10, in a vehicle driving process, a vehicle-mounted camera acquires surrounding images and identifies the surrounding images; s11, when it is detected that the vehicle of the specific vehicle type exists in the surrounding vehicles, the vehicle-mounted air conditioner is controlled to be in the internal circulation state; s12, the current starting time and the current vehicle speed of the vehicle are detected; s13, when the starting time of the vehicle exceeds the preset time and the current vehicle speed is lower than the preset vehicle speed threshold value, the vehicle density of a specific area in front of the vehicle is calculated and compared with a preset density threshold value; and S14, when the vehicle density is larger than or equal to the preset density threshold value, the vehicle-mounted air conditioner is contr