A guiding method for aircraft docking process, which is used to detect an aircraft when docking to a stop line along a J-line on apron, includes steps as followed. According to response distances of different positions from a laser scanner, a distance between the aircraft and the stop line and offset angle during the docking process are detected. To show the distance and offset angle on a data display panel as guiding reference when a pilot of the aircraft operates the aircraft. The guiding method further has a waiting stage, a positioning stage, and a distinguishing stage and a guiding stage.