Abstract:A method based on automatic photoelectric target-scoring system is proposed. The system positions, the bullet by detecting the laser-grid which will be obstructed when the bullet passes through. The method can reach a high accuracy and efficiently reduce the mistaken and missing situations. It can serve well for the training in troops and competitions for its advantages such as high accuracy, low cost and safety. In a word, this system is of great practical importance and has a good applying prospect.