Apparatus for displaying 3d ui

PURPOSE: A 3D UI display device is provided to display main menus based on a 3D UI made of polygonal cells, thereby displaying a lot of menus on one screen. CONSTITUTION: A display panel(120) displays main menus and displays a 3D UI(User Interface) made of polygonal cells. A sensing unit(110) senses selection of a user about a target main menu from the main menus. A controller(130) executes a function of a target main menu. The controller zooms a 3D sub UI in which shows the sub menus of the target main menu and displays the zoomed-in 3D sub UI on the display panel. If the sub menu is selected, controller indicates 'the side consisting of the lower menu of the sub menu' in the display panel.