Stop-violation snapping function: snapping photos fully meet the relevant requirements of GA/T832-2014 "Technical Specification for Image Forensics of Road Traffic Safety Illegal Acts". It can automatically acquire superimposed relevant information, such as location, time (accurate to milliseconds), license plate, etc., and print notification books through Bluetooth printer without hand-written backing glue. The vehicle photos and notifications are transmitted to the back-end server through 4G or WIFI network for unified management. Inspection and control function: Inspection and control system is the most intelligent technology product to assist traffic police to inspect eggs and illegal vehicles so far. Through feature recognition algorithm + 4G network automatic comparison of background blacklist data, 10 kinds of vehicle violations can be identified, without manual operation, installed in police cars, which can greatly improve the efficiency of traffic police law enforcement.