Abstract: The robot part mate is an important work process of robot assembly. A vision gu ided part mating method based on stereo vision is presented in this paper. In order to avoid the complex calculation and poor robustness in automatic visual guided process, a man-machine in teraction stereo vision method is developed. This method can improve the reliabi lity of image feature extraction and match in robot teleoperation. It can be sho wn by experiment that our method can execute this kind of part mating task when a 0.6mm gap or more exists between the active part and passive part.