Abstract: Aerial reconnaissance is an important means to obtain information, terrain and other relevant intelligence of the enemy. Various of electromagnetic and photoelectric signals used in the same aircraft platform are more widely. When the target is found by other reconnaissance means, it needs the position information of the target of the photoelectric reconnaissance system to search, track and verificate. When the photoelectric platform receives the coordinates of the target value, and the GPS and inertial navigation information of the airplane, the azimuth and elevation of the measured target are calculated real-timely. The platform guides target into the optical payload field, and tracks the target using the image tracking video. This paper studied the methods to guide the opto-electronic platform to trace the fixed targets or moving targets on the ground, which established the automatic guiding measurement equation, to translate the target coordinates from geodetic coordinate to the opto-electronic platform coordinate system. To analyze the each factors in automatic guiding measurement equation, using Monte Carlo statistical method, and find how each factors error in measurement equation to affect the precision of the final guidance, in order to improve the guiding precision puts forward some suggestions, the target can be well guided into the track field in a flight test.