The invention provides a method for restoring position information of robot. As to the robot having multiple hands, the material teachings is unnecessary in the exchange of the instrument comprising the bot, and the reassmbly or the robot exchange which is anything of the different view of the robot and the location information reconstruction method for preventing affecting the hand in which moreover, the result of the calibration about a hand differs is provided. In robot exchange forward and backward, the hand zero offset, of the robot and the hand fixed position coordinate showing the position of the robot at the outside coordinate system when spreading the cancer of the robot and moving hand to the fixed position and posture is acquired. It ways to be the difference of the zero offsetin forward and backward of the robot exchange the origin mismatch binaural and it ways to be the mismatch amount which it is based on the difference of the fixed position coordinate the coordinate mismatch binaural and the origin mismatch amount and coordinate mismatch amount are memorized according to hand it manages.
METHOD FOR RESTORING POSITION INFORMATION OF ROBOT