Search and rescue system ascertain the existence of a lost article/person using an electrical signal transmitted from a signal transmitter carried by the lost article/person. The position of the lost article/person is transmitted through a network. Search and rescue system include a signal generator, one or more search target finder, a position measurer, and a network. The search target finder ascertains presence of a search target by receiving an electrical signal. An analyzer analyzes the received electrical signal and generates an analysis signal in response to a determination that the received electrical signal is a signal transmitted from the signal generator. The analysis signal is transmitted to another search target finder or the position measurer via the network. The position measurer confirms existence of the search target, detects interruption in analysis signal reception, and controls the communication route of the analysis signal to maintain analysis signal acquisition.