The welding technology and engineering of Taiyuan University of Science and Technology is manual welding. Because it can be said for sure that welding technology and engineering definitely involve manual welding. Although some industries can realize automatic welding, most welding needs to be done manually. This is the reason why international welding engineers have high gold content. Welding smoke, ultraviolet rays, nitrogen oxides and ozone produced in the welding process are harmful to human body.