A display device (100, 100-1, 100', 100-2) comprising: a display disposed on a front surface of the display device (100, 100-1, 100', 100-2); a front camera configured to capture a user (40, 40') in front of the display device (100, 100-1, 100', 100-2); a rear camera configured to capture a wall surface positioned behind the display device (100, 100-1, 100', 100-2); and a processor configured to: determine a position of the user (40, 40') based on a captured image of the user (40, 40') and control the display to display an image corresponding to a partial area of the wall surface in a direction where the display device (100, 100-1, 100', 100-2) is positioned with reference to the position of the user (40, 40') of a captured image of the wall surface based on the position of the user (40, 40') and the distance (31, 33) between the display device (100, 100-1, 100', 100-2) and the wall surface, and characterized in that the display device comprises a sensor unit configured to measure a distance (31, 33) between the display device (100, 100-1, 100', 100-2) and the wall surface; and the processor is further configured to: based on the captured image of the user (40, 40'), with reference to a center of the display, obtain an angle of rotation from a vertical axis of a tangent plane of the display in a direction of the position of the user (40, 40') and a viewing angle for viewing an entire front surface of the display device (100, 100-1, 100', 100-2) from a virtual user on the vertical axis at the same distance as the user from the centre of the display and obtain the image corresponding to the partial area of the wall surface based on the angle of rotation and the viewing angle. a display disposed on a front surface of the display device (100, 100-1, 100', 100-2); a front camera configured to capture a user (40, 40') in front of the display device (100, 100-1, 100', 100-2); a rear camera configured to capture a wall surface positioned behind the display device (100, 100-1, 100', 100-2); and a processor configured to: determine a position of the user (40, 40') based on a captured image of the user (40, 40') and control the display to display an image corresponding to a partial area of the wall surface in a direction where the display device (100, 100-1, 100', 100-2) is positioned with reference to the position of the user (40, 40') of a captured image of the wall surface based on the position of the user (40, 40') and the distance (31, 33) between the display device (100, 100-1, 100', 100-2) and the wall surface, and characterized in that the display device comprises a sensor unit configured to measure a distance (31, 33) between the display device (100, 100-1, 100', 100-2) and the wall surface; and the processor is further configured to: based on the captured image of the user (40, 40'), with reference to a center of the display, obtain an angle of rotation from a vertical axis of a tangent plane of the display in a direction of the position of the user (40, 40') and a viewing angle for viewing an entire front surface of the display device (100, 100-1, 100', 100-2) from a virtual user on the vertical axis at the same distance as the user from the centre of the display and obtain the image corresponding to the partial area of the wall surface based on the angle of rotation and the viewing angle. determine a position of the user (40, 40') based on a captured image of the user (40, 40') and control the display to display an image corresponding to a partial area of the wall surface in a direction where the display device (100, 100-1, 100', 100-2) is positioned with reference to the position of the user (40, 40') of a captured image of the wall surface based on the position of the user (40, 40') and the distance (31, 33) between the display device (100, 100-1, 100', 100-2) and the wall surface, and characterized in that the display device comprises a sensor unit configured to measure a distance (31, 33) between the display device (100, 100-1, 100', 100-2) and the wall surface; and the processor is further configured to: based on the captured image of the user (40, 40'), with reference to a center of the display, obtain an angle of rotation from a vertical axis of a tangent plane of the display in a direction of the position of the user (40, 40') and a viewing angle for viewing an entire front surface of the display device (100, 100-1, 100', 100-2) from a virtual user on the vertical axis at the same distance as the user from the centre of the display and obtain the image corresponding to the partial area of the wall surface based on the angle of rotation and the viewing angle. based on the captured image of the user (40, 40'), with reference to a center of the display, obtain an angle of rotation from a vertical axis of a tangent plane of the display in a direction of the position of the user (40, 40') and a viewing angle for viewing an entire front surface of the display device (100, 100-1, 100', 100-2) from a virtual user on the vertical axis at the same distance as the user from the centre of the display and obtain the image corresponding to the partial area of the wall surface based on the angle of rotation and the viewing angle.