1. A user interface to be displayed on a monitor for managing icons on a group-by-group basis using a skin image, the user interface comprising: an icon room which selectively provides one of a stored skin image and a reduction of the skin image, as a reduced skin image, on a desktop background depending on a determination of whether the icon room is activated; and a plurality of icon images which are included in the icon room and are provided on the skin image on the desktop background when the determination indicates that the icon room is activated, with the reduced skin image being provided on the desktop background instead of the skin image when the determination indicates that the icon room is not activated, wherein the icon images included in the icon room and objects linked to each of the icon images have at least one common attribute, and wherein there are a plurality of icon rooms, with respective skin images, and the icon images on the desktop background are automatically included in a relevant icon room according to attributes that are set for the icon rooms.