A electro-optical measurement system for precise bullet location composed of four light screens with special geometrical frame is described respectively. Light source of the screens is formed by LED array. The PIN infrared photo-diodes array used as sensors. The longest effective distance between light source and sensors is 3 m. The detailed circuits of system are given. The measurement system was verified by using 5 kinds of small caliber pellets. As compared with the paper target sheet, the system design...