Elevator should be defined as: elevator on the vertical channel carrying people or goods lift platform or semi-closed platform lifting machinery and equipment or device. Is by the platform and manipulate them with Drum Lifter equipment, motor, cable and other auxiliary equipment consisting of a whole. Similar to the elevator, first should be traced back to ancient China and the European countries, then have to jigger tools such as vertical transport people and goods. Modern elevator is the product of after the 19th century the invention of the steam engine. Born in 1845, the first hydraulic lift, when using liquid for water. In 1853, americans eliza, Otis invented automatic safety device, Elisha Otis greatly improved the safety of the wire rope tractive elevator, March 23, 1857, American New York a floor shop installed the first five layers using passenger elevator Otis safety devices. Since then, the use of the elevator has been widely accepted and high-speed development. The original elevator is driven by a steam engine, so the building must be fitted with boiler room. In 1880, the German Siemens invention use Electric Hoist, worthy of the name of "lift" appeared officially from now on. Since then, the use of the elevator has been widely accepted and high-speed development.