In production and life, are inseparable from the role of mechanical and electrical equipment. One of the most widely used electromechanical equipment is metal cutting machine tools, lifting equipment. There are many kinds of mechanical and electrical equipment. To master certain knowledge of the classification of mechanical and electrical equipment helps us to understand mechanical and electrical equipment in the system, or to master it in time in practical use. Generally, according to the use of electromechanical equipment, it can be divided into three categories: industrial electromechanical equipment, information electromechanical equipment, and people's livelihood electromechanical equipment.