1. An apparatus comprising: a key display unit configured to display a list of keys for searching for an image; a key designating unit configured to designate the key among the list of keys; an acquiring unit configured to acquire attribute information based on the designated key and image information on an image having the attribute information; and a group information display unit configured to display information of images classified into a group corresponding to the attribute information based on the acquired attribute information and the acquired image information as a group information; a group designating unit configured to designate at least one of a plurality groups into which images are classified; and an image display unit configured to, when a group is designated by the group designating unit, automatically display at least one of a plurality of images belonging to the designated group, an image switching unit configured to switch an image to be displayed by the image display unit, wherein, when the image switching unit switches the image to be displayed, the image display unit displays another image belonging to the group designated by the group designating unit, wherein the key list displayed by the key display unit, the group information displayed by the group information display unit and the image displayed by the image display unit are displayed within one display screen together, wherein the key designating unit, the group designating unit and the switching unit are different operating members.