To provide service information management system and method which are convenient for a user. A service information management system, which manages information on a service provided from a service provider to a service user, includes: a first service management data acquisition unit that acquires first service management data for managing a service usage state for each facility of the service user; a second service management data acquisition unit that acquires second service management data storing a service usage state for each facility; an association unit that collates the first service management data with the second service management data to associate the service usage state included in the first service management data with facility identification information included in the second service management data; and a data provision unit that provides data obtained by association of the association unit to a computer of the service user.