A mobile terminal comprising: a controller configured to determine a category of an application program and an image (9-1; 12-1; 13-1; 16-1; 18-4; 21-1) representing the application program, and to determine an icon (9-2; 12-2; 13-2; 16-2; 18-3; 21-2) corresponding to the determined category of the application program; and a display unit configured to simultaneously display the image representing the application program and the icon corresponding to the determined category of the application program; wherein the controller is configured to display the icon corresponding to the determined category of the application on at least a part of the image representing the application program, and wherein the controller is further configured to, based on a selection by a user of the icon displayed on the image, identify at least one other image having the same icon as the selected icon, each one among the at least one other image representing one among at least one other application program being in the same category as the application program represented by the image, and display the image associated with the selected icon and the identified at least one other image arranged in a preset direction on the display unit, characterized in that the controller is configured to, when the icon displayed on the image is moved by being dragged by the user to a different image representing a different application program, display on the display unit a menu for setting the moved icon, wherein the menu includes: a first command for changing all icons displayed on all images representing all application programs in the same category as the different application program to the moved icon; and a second command for changing an icon displayed only on the different image to the moved icon, wherein the controller is further configured to, in response to a selection of one of the first and second commands included in the menu: when the first command is selected, perform the changing corresponding to the first command, the moved icon indicating a category of all the application programs in the same category as the different application program, when the second command is selected, perform the changing corresponding to the second command, the moved icon indicating a category of the different application program. a controller configured to determine a category of an application program and an image (9-1; 12-1; 13-1; 16-1; 18-4; 21-1) representing the application program, and to determine an icon (9-2; 12-2; 13-2; 16-2; 18-3; 21-2) corresponding to the determined category of the application program; and a display unit configured to simultaneously display the image representing the application program and the icon corresponding to the determined category of the application program; wherein the controller is configured to display the icon corresponding to the determined category of the application on at least a part of the image representing the application program, and wherein the controller is further configured to, based on a selection by a user of the icon displayed on the image, identify at least one other image having the same icon as the selected icon, each one among the at least one other image representing one among at least one other application program being in the same category as the application program represented by the image, and display the image associated with the selected icon and the identified at least one other image arranged in a preset direction on the display unit, characterized in that the controller is configured to, when the icon displayed on the image is moved by being dragged by the user to a different image representing a different application program, display on the display unit a menu for setting the moved icon, wherein the menu includes: a first command for changing all icons displayed on all images representing all application programs in the same category as the different application program to the moved icon; and a second command for changing an icon displayed only on the different image to the moved icon, wherein a first command for changing all icons displayed on all images representing all application programs in the same category as the different application program to the moved icon; and a second command for changing an icon displayed only on the different image to the moved icon, wherein the controller is further configured to, in response to a selection of one of the first and second commands included in the menu: when the first command is selected, perform the changing corresponding to the first command, the moved icon indicating a category of all the application programs in the same category as the different application program, when the second command is selected, perform the changing corresponding to the second command, the moved icon indicating a category of the different application program. when the first command is selected, perform the changing corresponding to the first command, the moved icon indicating a category of all the application programs in the same category as the different application program, when the second command is selected, perform the changing corresponding to the second command, the moved icon indicating a category of the different application program.