A vertical elevator powered by an electric motor, equipped with a box shaped pod, used for carrying people or goods in multi-storey buildings. There are also stepped elevators, where the treads are installed on the tracks and run continuously, commonly known as automatic elevators. Fixed lifting equipment serving designated floors. It has a car that runs between at least two vertical or rigid guide rails with an inclination angle less than 15 °. The size and structural form of the elevator car are convenient for passengers to enter and exit or for loading and unloading goods. 

An elevator is a vertical lift powered by an electric motor, equipped with a box shaped car, used for carrying people or goods in multi story buildings. There are also stair treads that run continuously on tracks, commonly known as escalators or moving walkways. Fixed lifting equipment serving designated floors. A vertical elevator has a car that runs between at least two vertical rigid guide rails. The size and structural form of the elevator car are convenient for passengers to enter and exit or for loading and unloading goods. Traditionally, regardless of its driving method, elevators are regarded as a general term for vertical transportation vehicles within buildings. According to speed, elevators can be classified into low-speed elevators (less than 1 meter/second), high-speed elevators (1-2 meters/second), and high-speed elevators (more than 2 meters/second). Hydraulic elevators began to appear in the mid-19th century and are still used in low rise buildings today. In 1852, in the United States, E G. Otis has developed a safety elevator that uses steel wire ropes for lifting. In the 1980s, the driving device was further improved, such as the electric motor driving the winding drum through worm gear transmission, and the use of balance weights. At the end of the 19th century, friction wheel transmission was adopted, greatly increasing the lifting height of elevators. 

At the end of the 20th century, elevators were powered by permanent magnet synchronous traction machines. Greatly reducing the footprint of the computer room, and possessing advantages such as low energy consumption, energy efficiency, and fast improvement speed, it greatly promotes the development of real estate towards super high-rise buildings.