In order to track target with high precision

measurement precision of target moving parameters should be enhanced during tracking process of photoelectric theodolite. Combined with practical issues in engineering

propose a comprehensive method of intersection measurement by single-station and two-station

employ cubic spline interpolation method to fit motion track of target

object position information and moving parameters at any time point are determined by using this method. The experimental results show that the precision of velocity detection reaches 0. 351 m / s while ranging precision is 0. 2 m of laser range finder and encoder of angle measurement precision is 20 ’’. The presented method is proved to have high data utilization ratio

simplified calculation and good real-time performance comparing to traditional approaches.