A control server includes an information acquisition unit configured to acquire information indicating an imaging condition of a plurality of imaging apparatuses, a communication parameter determination unit configured to determine a time length during which each of a plurality of pieces of image data based on image capturing by the plurality of imaging apparatuses is communicable, based on the information acquired by the acquisition unit, and a control unit configured to perform control so that communication of the plurality of pieces of image data is performed in accordance with the time length determined by the determination unit.