The origin and development of the Ashi point theory are arranged, it is believed that the essence of Ashi point is a point locating method and it is suitable for the location of each acupoint. Originated from Neijing (Internal Classic), this method is the primary point locating method in ancient times, corresponding to the forms of acupoints in Neijing (Internal Classic), the points are located though palpation. This point locating method can be widely used to locate the points clinically, what's more, the Ashi method is not limited to use for local tenderness. Ashi point got its conception from Qianjin Yao fang (Prescriptions Worth a Thousand Gold), under the background of acupoint channel tropism, it gradually evolved to a certain kind of point that parallel to the regular point and extra point. This process changed the clinical point locating method: regular point and extra point are located according to proportional bone measurement, while Ashi point is located by palpation. However, it betrays the classic and clinical practice gradually.