PROBLEM TO BE SOLVED: To provide an endoscope localization method.SOLUTION: An endoscope localization method includes the following steps: a localization assist device is attached to a machine arm, and a terminal end of a positioning mechanism of the localization assist device is overlapped with a spherical rotary center defined by the machine arm; then an endoscope is inserted into the localization assist device and fixed; the positioning mechanism of the localization assist device is removed, and a terminal end of the endoscope is overlapped with the spherical rotary center of the machine center; and the endoscope is inserted into a conduit which is inserted into a body cavity to complete localization. By the above mentioned steps, the endoscope localization method of the present invention includes reducing a preparation time before operation, and improving accuracy of localization work. Furthermore, it is not necessary to cause the body cavity to be brought into contact with other tools, thereby reducing a
