The invention discloses a remote control power extension unit device, which comprises a power extension unit and a status detection transmission circuit which is arranged in a host computer and is connected with the power extension unit in a wireless way, wherein the input end of the status detection transmission circuit is connected with a status light of the computer, the status detection transmission circuit is used for detecting the running status of the computer system and automatically transmitting corresponding power-on and power-off encoding information of a power of a socket on the power extension unit according to the running status of the computer system, the power extension unit receives the corresponding power-on or power-off encoding information of the power of the corresponding socket to directly control the power on or off of the power of the socket; when the power of the host computer is in a power-off status, the status detection transmission circuit can automatically transmit the power-on encoding information of the host socket by pressing a power button POWERSW on a case, and the computer is started. The power extension unit of the invention can be exchanged between computers, has convenient use and stable control, and has great use value and social significance.