In the central processing unit, the central processing method, and the monitored person monitoring system according to the present invention, a plurality of operation reception notification communication signals are received via each of the plurality of sensor devices. If there are a plurality of operation reception notification communication signals that contain the same ID for identifying and identifying the operation reception device, first among the plurality of operation reception notification communication signals that contain the same ID A predetermined process is executed for the received operation reception notification communication signal, and the predetermined process is not executed for the remaining operation reception notification communication signal.本発明の中央処理装置、中央処理方法および被監視者監視システムでは、複数のセンサ装置それぞれを介して操作受付通報通信信号が複数受信された場合であって、この複数の操作受付通報通信信号の中に同一の、操作受付装置を特定し識別するためのＩＤを収容する複数の操作受付通報通信信号が存在する場合、前記同一のＩＤを収容する複数の操作受付通報通信信号の中で最初に受信された操作受付通報通信信号に対し所定の処理が実行され、残余の操作受付通報通信信号に対し前記所定の処理は実行されない。
