To simplify the complicated operation of an ID number or password in a system for remotely accessing and controlling equipment such as motor- driven lock, illumination equipment and air conditioner by connection through a telephone line or the Internet to a control terminal in a house or office by a portable telephone set.

The remote control system for equipment is configured by using an abbreviated key device, which is easily attachable to and detachable from the external connecting terminal of a portable telephone, has a memory storing the ID number and the password and has a function capable of transmitting memory contents from the portable telephone by the simple button operation of the portable telephone.