An MRI system center (1) is connected to a plurality of MRI systems (2) for visualizing the interior of a subject to be examined using a magnetic resonance phenomenon, through an electronic communication line (33). The MRI system center (1) receives data of a log file on which a use state of the MRI systems (33) is recorded or use-state data extracted from the log file, from the MRI systems (33) through a communication control unit (17). A database unit (10) stores the data of the log file or the use-state data. An analysis unit (18) analyzes the data of the log file or the use-state data received within a given period of time.
