A display apparatus is provided. The display apparatus includes: a detector configured to detect one or more user viewing positions; a display configured to have a changeable curvature; and a controller receiving information of the one or more user viewing positions from the detector, the controller configured to determine deviations between right-side viewing angles and left-side viewing angles at each of the one or more detected user viewing positions for a first curvature and a second curvature of the display; and the controller configured to set the changeable curvature of the display based on the deviation determinations between the right-side viewing angle and the left-side viewing angle.