The present invention by combining the mounting orientation and inexpensive door sensor of the human sensor, to provide a watch reliably determining the elderly go out / home of the resident system. A has been arranged so as to cover the living space in each dwelling such as collective housing, residents of movement and life as well as action to place the sensor for detecting, human sensor the entrance door 23 detection area is placed to become oriented such as 25 and 28, it was to be provided to non-detection zone in the lower part of the front door. .BACKGROUND
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