wireless alert apparatus and wireless alert system and wireless alert method thereof

The present invention relates to a method of wireless alarm devices and the wireless alarm system and a wireless alarm. Wireless alarm device according to the invention the communication unit for performing communication with outside of the information processor and; Sensing unit for sensing the distance between the radio and the alarm and the information processing apparatus; Characterized in that it comprises a control unit for the distance sensed by the sensing unit generates an alarm when more than predetermined value, when said sensed distance is less than the predetermined value send a command signal to the information processor in the information processor It shall be. In this way, it is possible to transmit an emergency signal to the information processing apparatus set up in the case of emergency, it is possible to prevent the loss of the portable information processing apparatus, to perform the function of a remote controller that transmits a command signal to an external information processing apparatus and it can transmit the location information of the user to the correct server.