A user terminal device and a displaying method thereof are provided. The user terminal device includes a display which is divided by a folding line into a first area and a second area, the second area being larger than the first area and comprising an exposure area that is exposed while the display is folded along the folding line such that the first area faces the second area, a detector configured to detect a first user interaction of moving along a long side of the exposure area and a second user interaction of moving along a short side of the exposure area, and a controller configured to display a first function execution screen on the exposure area in response to detecting the first user interaction, and display a second function execution screen on the exposure area in response to detecting the second user interaction.