Abstract: A system includes a sensor detecting entry/exit of a person to/from a toilet and a sensor detecting leaving/sitting on a toilet seat installed on a toilet bowl; acquires excretion information indicating at least a start and an end of excretion, based on imaging data captured by an image capture apparatus installed in such a way as to include, in an image capture range, an excretion range of excrement in the bowl; authenticates a person performed entry/exit, and determines whether the person is a person to be assisted as a user of the toilet or a helper; outputs notification information to a notification destination, based on a detection event indicated by the excretion information, entry/exit information, leaving/sitting information, and an authentication result, and a notification condition; and stores, as the notification condition, necessity of notification, and the notification information and the notification destination when notification is necessary, for each events.