A user terminal device comprising: a single display that is flexible and configured to be divided into a plurality of display areas (321; 323; 325) of the single display along a plurality of folding lines (310; 315); a plurality of hinges (341; 343) configured to support the display along the plurality of folding lines (310; 315); a detector configured to detect a bending state of the display along the plurality of folding lines (310; 315); a common image processor, and a controller configured to, in response to a detection of the display being bent along at least one of the plurality of folding lines (310; 315), perform different operations based on a bending state of the display and control the single display to display information in the plurality of display areas (321; 323; 325) of the single display, said controller comprising a common graphic processor and being configured to generate content for each of the plurality of display areas (321; 323; 325) of the single display using the common graphic processor and the common image processor, wherein the common graphic processor and the common image processor are common to each of the plurality of display areas (321; 323; 325) of the single display, wherein in response to a detection of a bending interaction of bending the display in a first direction along a first folding line among the plurality of folding lines and unfolding the display again while a first screen is displayed on the display when the display is in a unfolded state, the controller is configured to control the display to display a second screen which is a next screen of the first screen, and wherein in response to a detection of a bending interaction of bending the display along a second folding line in a second direction among the plurality of folding lines and unfolding the display again while a first screen is displayed on the display when the display is in a unfolded state, the controller is configured to control the display to display a third screen which is a previous screen of the first screen. a single display that is flexible and configured to be divided into a plurality of display areas (321; 323; 325) of the single display along a plurality of folding lines (310; 315); a plurality of hinges (341; 343) configured to support the display along the plurality of folding lines (310; 315); a detector configured to detect a bending state of the display along the plurality of folding lines (310; 315); a common image processor, and a controller configured to, in response to a detection of the display being bent along at least one of the plurality of folding lines (310; 315), perform different operations based on a bending state of the display and control the single display to display information in the plurality of display areas (321; 323; 325) of the single display, said controller comprising a common graphic processor and being configured to generate content for each of the plurality of display areas (321; 323; 325) of the single display using the common graphic processor and the common image processor, wherein the common graphic processor and the common image processor are common to each of the plurality of display areas (321; 323; 325) of the single display, wherein in response to a detection of a bending interaction of bending the display in a first direction along a first folding line among the plurality of folding lines and unfolding the display again while a first screen is displayed on the display when the display is in a unfolded state, the controller is configured to control the display to display a second screen which is a next screen of the first screen, and wherein in response to a detection of a bending interaction of bending the display along a second folding line in a second direction among the plurality of folding lines and unfolding the display again while a first screen is displayed on the display when the display is in a unfolded state, the controller is configured to control the display to display a third screen which is a previous screen of the first screen.