The invention discloses a multi-room switching household hanging projector which comprises a projector body. A circumferential guide rail is arranged on the inner upper portion of the projector body.The multi-room switching household hanging projector is characterized in that a pulley device is arranged on the lower portion of the circumferential guide rail, a wheel carrier is arranged on the lower portion of the pulley device, a vertical moving device is arranged on the lower portion of the wheel carrier, a rotating device is arranged on the lower portion of the vertical moving device, and alifting device is arranged on the lower portion of the rotating device. The multi-room switching household hanging projector is simple in structure and convenient to use, signals are transmitted to areceiver by remote control, the receiver controls a plurality of motors by a single chip microcomputer, so that projection positions or angles of the projector are quite conveniently and accurately changed by remote control, and inconvenience in manual adjustment is omitted. Moreover, as the circumferential guide rail can be mounted and connected among ceilings of rooms, a pulley motor is remotely controlled, pulleys move, the projector can be switched among a plurality of rooms, cost is saved, and the projector is convenient.