The welding robotic control software could auto generate the weldpath, perform 3D welding weave, complex, non-straight welding path. It can set up the robot task within 2 minutes. The robot can provide standard welding quality to improve the productivity by replacing experienced welder on site. The weight of six-axis robot arm is light (11-28kg) with (0.5-1.3m) reach radius provide flexible mobility requirement for construction industry. Legend: 14