Vehicle door angle detection device and method, vehicle paint spraying system and medium

The invention relates to a vehicle door angle detection device, comprising: an angle detection module configured to emit a detection signal to a position to be detected of a vehicle door and provide a detection result at least based on the influence of the vehicle door on the detection signal in space transmission; the control module is in communication connection with the angle detection module and is configured to determine the difference between the position of the vehicle door and a reference value based on the detection result; and based on the difference, whether the vehicle door reaches the opening and closing angle or not is judged, if the judgment result indicates that the vehicle door does not reach the opening and closing angle, the control module generates first prompt information, and if the judgment result indicates that the vehicle door reaches the opening and closing angle, the control module generates second prompt information. According to the limiting device, the defects of collision or pai