Axial system error in the airborne photoelectric turret system is one of the main factors influencing servo tracking and the pointing accuracy of the optical axis. In order to analyze the influence magnitude of the axial system error on the precision, the principle of coordinate transformation was used, and the mathematic models of the airborne photoelectric turret system under the ideal state of yawing and pitching, as well as under servo-tracking with axial system error, were built up. Numerical computation and simulation analysis were carried out. The characteristic curve of the simulation showed that the influence of the axial system error on the precision varies at different servo angles. In order to satisfy the requirements of the airborne photoelectric turret system, such as a high-precision servo-tracking and pointing of the optical axis, and high-resolution environment detecting and sensing, a method for error elimination and precision improvement was put forward. The method can be applied to the design analysis, error control and technical problem disposal of the airborne photoelectric turret system, and is of significance for practical engineering applications.