An integer coordinate commutation project is advanced which leads the aim angle information form optic–electronic detecting system to aim map orientation system and then to countermine system under the middle precision GPS orientation section. This way can we solve the difficult problem that the warning aims coordinate commutation among many optic–electronic vehicle systems. The aim orientation is realized by neat matrix principle. First, the 12 coordinate systems of optic–electronic detecting vehicle system and laser countermine system are defined. Then, the aim coordinate transform mode is changed from the warning sys-tem to the countermine system. It seems that this mode can satisfy the "360" error request of the two vehicle optic–electronic system aim coordinate leading orientation under the complexion of without regarding to the relatively position and angle of the optic–electronic detecting vehicle and laser countermine vehicle.