The invention relates to an intelligent vehicle overspeed snapshot system, which comprises a snapshot system, a vehicle speed detecting device, a visibility detecting device and a central control unit, wherein the vehicle speed detecting device is used to obtain vehicle speed data, the central control unit is used to judge that vehicles are overspeed and to dictate a camera of the snapshot device to shoot, the camera is used to shoot to obtain video images of overspeed vehicles and to send the images to a central processing unit, the central processing unit is used to analyze and operate the video images of the overspeed vehicles to obtain license plate numbers of the overspeed vehicles, the visibility detecting device is used to collect visibility data and send the data to the central processing unit, the central processing unit is used to read pre-stored highest speed limit data corresponding to the grade visibility range, and the pre-stored highest speed limit data is taken as the highest speed limit for judging whether the vehicles are overspeed or not. The system automatically recognizes the weather conditions and sets the highest speed limit on the regulated value corresponding to the weather conditions, and the monitoring to the overspeed vehicles is effectively realized.