To provide means for multilaterally acquiring and monitoring the video of a suspicious person.

A server device includes a positional information reception section, a suspicious person information reception section, a specification section; a transmission request section and a video information reception section. The positional information reception section receives positional information for each electronic camera via radio communication. The suspicious person information reception section receives suspicious person information from at least one of a plurality of electronic cameras via radio communication. The specification section specifies an electronic camera present around an electronic camera transmitting the suspicious person information on the basis of the positional information transmitted from the electronic camera when the suspicious person information reception section receives the suspicious person information. The transmission request section transmits a transmission request of video information based on the suspicious person information to the electronic camera transmitting the suspicious person information and the electronic camera specified by the specification section via radio communication. The video information reception section receives the video information from the electronic camera transmitting the suspicious person information and the electronic camera specified by the specification section via radio communication.