Abstract: Travel purpose determination according to the present disclosure, is provided with: a determination rule specifying date and time for allowing use of a transport system for business, a geographical area, and a destination; and a usage history acquisition unit that acquires an entry station, an exit station, usage date and time included in usage record of the transport system, user identification information, and location information. The travel purpose determination includes determining whether a purpose of travel is usage on business, based on acquired information and the determination rule.