A user terminal apparatus, comprising: a display comprising 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: in response to a predetermined touch input being input on the sub display area, to control the display to display, on the main display area, a user interface, UI, displayed on the sub display area,; and while the UI is displayed on the sub display area and the main display area, to control the display to display, on the main display area, an indicator indicating a touched point on the sub display area, wherein the UI displayed on the sub display area comprises a plurality of UI elements having display locations from the left side to the right side of the UI according to a sub display area arrangement, wherein the processor is configured to control the display to display, on the main display area, the plurality of UI elements according to an arrangement that is the same as the sub display area arrangement, and wherein, when the display displays, on the main display area, the plurality of UI elements according to the arrangement and in response to the touched point moving, on the UI displayed on the sub display area and with reference to the sub display area, in a first direction including one of a left direction and a right direction, the processor is configured to display, on the main display area, the indicator moving, with reference to the main display area, in a second direction including one of a left direction and a right direction that is the same as the one of the left direction and the right direction of the first direction. a display comprising 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: in response to a predetermined touch input being input on the sub display area, to control the display to display, on the main display area, a user interface, UI, displayed on the sub display area,; and while the UI is displayed on the sub display area and the main display area, to control the display to display, on the main display area, an indicator indicating a touched point on the sub display area, wherein the UI displayed on the sub display area comprises a plurality of UI elements having display locations from the left side to the right side of the UI according to a sub display area arrangement, wherein the processor is configured to control the display to display, on the main display area, the plurality of UI elements according to an arrangement that is the same as the sub display area arrangement, and wherein, when the display displays, on the main display area, the plurality of UI elements according to the arrangement and in response to the touched point moving, on the UI displayed on the sub display area and with reference to the sub display area, in a first direction including one of a left direction and a right direction, the processor is configured to display, on the main display area, the indicator moving, with reference to the main display area, in a second direction including one of a left direction and a right direction that is the same as the one of the left direction and the right direction of the first direction. in response to a predetermined touch input being input on the sub display area, to control the display to display, on the main display area, a user interface, UI, displayed on the sub display area,; and while the UI is displayed on the sub display area and the main display area, to control the display to display, on the main display area, an indicator indicating a touched point on the sub display area, wherein the UI displayed on the sub display area comprises a plurality of UI elements having display locations from the left side to the right side of the UI according to a sub display area arrangement, wherein the processor is configured to control the display to display, on the main display area, the plurality of UI elements according to an arrangement that is the same as the sub display area arrangement, and wherein, when the display displays, on the main display area, the plurality of UI elements according to the arrangement and in response to the touched point moving, on the UI displayed on the sub display area and with reference to the sub display area, in a first direction including one of a left direction and a right direction, the processor is configured to display, on the main display area, the indicator moving, with reference to the main display area, in a second direction including one of a left direction and a right direction that is the same as the one of the left direction and the right direction of the first direction.