A content management server extracts an incident video and incident information corresponding to prescribed key information related to the incident information, and sends the extracted information to a center device. A center device superimposes video attribute information related to an incident video on map information based on positional information of an imaging place of the incident video included in the incident information in the incident video display screen, displays the video attribute information in the imaging place on the map of the map information, and reproduces and displays the incident video corresponding to the video attribute information in a case where a video reproduction instruction is given by a user.