To exactly monitor the living condition of a resident with an external managing center from the state of using respective water faucets attached in a house and further to speedily discover the abnormal state of respective water faucets or piping.

Concerning this supervisory system, respective headers 4 and 5 for distributing hot water and water supplied from hot water supply pipes 3 and water supply pipes 7 to plural branch parts 6 and respective water faucets 1 arranged at prescribed positions inside the house are connected by a water pipe 9 inserted under the floor, a flow sensor 12 is arranged at a required spot between the respective water pipes 9 and the headers 4 and 5, a signal detected by the flow sensor 12 is outputted to a control part 15 and the control part 15 is provided with a deciding circuit 20, with which the occurrence of abnormality is judged when there is not water supply from the respective water faucets 1 for prescribed time while the resident is at home, and reports it through a communication line to the external managing center.