Abstract: The lunar satellite's kinematic law and dynamic partial equation are described,the applicability of dynamic method and kinemetic method in lunar satellite orbit determination are discussed,the computation mode and optimization algorithm to determine lunar gravity field from observation are summarized.Based on concluding the computation flow of lunar gravity field recovery,the method of dealing with the difficulty of unobservable to farside of lunar are analyzed on emphases.Finally,considering the point that our national "Chang'e 1" will be launched with a laser altimetry on it,the idea and its flow chart to determinate lunar gravity field model with the stronger correlation as a restriction between lunar topography and gravity field is proposed.