An apparatus and a method that controls a position of a caption. The apparatus includes: a caption processing unit, which identifies a non-signal area (B) including the caption using a control signal, identifies an image data area (A having the same size as the non-signal area (B), on a screen, and displays caption data of the non-signal area (B) on the image data area (A); a controller, which outputs a control signal positioning the captions to be lost in an enlarged presentation mode on the screen; and a signal processing unit, which performs image signal processing so that the caption data is displayed with predetermined images on the image data area (A).