To provide a mechanism for acquiring from a driver recorder much more information necessary for verifying a rating blame between persons who are involved in a vehicle accident.

When an collision accident occurs, a drive recorder 20-k(=1, 2, ...) transmits an accident occurrence notification message including latest location data to a drive recorder operation support server device 40, and after the lapse of 10 seconds, stops recording photographic data of a video camera 23. An accident occurrence notification message is transferred from the drive recorder operation support server device 40 to the drive recorder of another vehicle. When determining that the location of the other vehicle shown by the location data included in the message is included in the viewing angle of the horizontal direction of its own shooting range, the drive recorder of the other vehicle stops recording the photographic data after the lapse of 10 seconds.