The development and status of airport docking guide system are introduced in this paper.The realization methods of several kind foreign products and patents are compared in a systematic way.Development trends are also introduced.The structure and work principle of the system which is based on three-dimensional laser scanning technology are illustrated.The design requirements of pulsed laser ranging technology and dual galvanometer scanning technology are discussed.The corresponding correction methods are put forward and the data processing flow and key points in algorithm design are also illustrated.