A user terminal apparatus is provided. The user terminal device includes a display having a main display area disposed on a front side of the user terminal apparatus and a sub display area extended from one side of the main display area to be disposed on at least one area of a rear side of the user terminal apparatus and a processor configured to, in response to a predetermined touch input being input on the sub display area, control the display to display a UI displayed on the sub display area on the main display area.