A cleanup assisting system includes: a space state detector that detects a state in which items are scattered in a space; a space state determiner that determines a scattering degree of the items based on a result of detection by the space state detector; an action state detector that detects an action of a first subject person cleaning up the items; an action state determiner that determines whether the first subject person has an interest in the action of cleaning up the items, based on a result of detection by the action state detector; a processor that determines content of a notification to be provided to a second subject person different from the first subject person, based on results of determination by the space state determiner and the action state determiner; and a notifier that provides a notification including the content determined by the processor to the second subject person.