The invention relates to an electronic traffic police system which comprises a whistle sound acquisition unit, a whistle sound recognition unit, a whistle sound source location unit, a position measurement unit, a whistle sound source tracking unit, an image acquisition unit and a license plate recognition unit, wherein the whistle sound acquisition unit, the whistle sound recognition unit, the whistle sound source location unit, the position measurement unit, the whistle sound source tracking unit, the image acquisition unit and the license plate recognition unit are based on a microphone array and are successively connected. The whistle sound source tracking unit and the license plate recognition unit are connected with a central control unit. According to the invention, coordinate measuring is carried out on the whistle sound source location information and the license plate location information of a vehicle; the sound source coordinate information acquired by the whistle sound source tracking unit is transmitted to an image acquisition system; license plate capturing is carried out in a designated range, which reduces the hardware storage pressure and improves the processing efficiency of the system; by increasing a weight searched in the designated area, the whistle sound source positioning accuracy can be effectively improved; considering the timing correlation characteristic of a whistle signal, a whistle sound source is tracked in real time; the processing speed is fast; and vehicle violation information is sent to a traffic management department in real time.