The image search system according to the present invention accumulates virtual viewpoint video image data generated based on image data obtained by capturing an object from a plurality of directions by a plurality of cameras and a virtual viewpoint parameter used for generation of the virtual viewpoint video image data in association with each other. Then, the image search system extracts, in a case where a search condition is input via an input unit, virtual viewpoint video image data associated with a virtual viewpoint parameter corresponding to the search condition from the accumulated virtual viewpoint video image data. Further, the image search system presents information of the extracted virtual viewpoint video image data as results of the search. Due to this, convenience relating to a search for a virtual viewpoint video image improves.