A foldable display device includes a screen maintained in one of a folded state and an unfolded state, the screen, when switched from the unfolded state to the folded state, being divided into a first screen sensing a user input and a second screen displaying a first image, and a controller displaying a specific image corresponding to the user input on the second screen when the user input is sensed on the first screen in the folded state. The first screen displays a second image that is the same as the first image.