Domestic elevator refers to the elevator installed in private residence, only for single family members. It can also be installed in a building that is not used by a single family, as a tool for a single family to enter its dwelling. but the public or other occupants within the building cannot access and use it. Home elevator rated speed of not more than 0.4m/s, for no car door household elevator rated speed not exceeding 0.3m/s, car travel not more than 12M, rated load is not more than 400KG. Mainly divided into the elevator, the elevator screw, the structure of several hydraulic elevator.