PURPOSE: To make it possible to discriminate whether an automobile is in normal state or not from a remote place by reporting the state of a burglarproof system on a condition that there are an calling in the state of power on and the inputting of a specified self identification code.

CONSTITUTION: A time at which an automobile telephone system MTS is made to the state of power on and the duration time of power on are set by operating in advance the operating section 202 of a burglarproof system and stored in the memory MEM of a controlling section 203. When the power on time arrives, the controlling section of the system MSP outputs a power enabling signal to a power controlling line and makes the power of the system MTS on. Further, the controlling section 203 instructs a timer 204 to start the counting of time. The state of the system MSP is reported to other party on a condition that there is the incoming call under this condition and a specified self identification ID code is inputted.