Abstract: Laser vision sensing assisting teleteaching technology,(LSAT),which was used in remote welding,was presented.The technology overcame the drawback of teleteaching assisted by stereoscopic vision display and relieved the payload of human operator.Welding seam feature point was extraced by laser vision sensing that enhanced the precision of seam identification in teleteaching.Space mouse acted as the hand controller in teleoperation to increase the performance capability.The experiment results illustrated that the technology can decrease the teleteaching time and enhance the capability of adapting environment.Accurate welding path and automatic welding process avoid time-delay for the long distance teleoperation.The LSAT has practical value for remote welding.