Abstract: The technical solution for electro-optical pod inertial orientation during the geographic tracking was discussed. An accelerator was added in the stabilized platform, which could rotate in azimuth and elevation. The accelerator was combined with the gyroscope on board to form an inertial measurement unit, which provided the signals to servogimbal driving system and navigation system. The attitude matrix of the moving platform could be resolved when the stabilized sight was pointing at a target. By use of the rotation angle of the gimbals, the pod attitude matrix was obtained. The component of the pod acceleration value in the navigation coordinate system was calculated, and the derivation of the flight path was realized. The theoretical analysis and verification test indicate that the orientation and attitude of the electrooptical pod can be obtained with inertial measurement unit.