An electronic apparatus is disclosed. The electronic apparatus includes a communicator, a camera, a memory storing a reference image including a plurality of gradation regions that have different gradation values, and a processor to photograph the display device that outputs the reference image and a background of the display device, through the camera, obtain correction data for correcting a gradation value of the photographed image based on a plurality of gradation regions included in the photographed image and a plurality of gradation regions included in the stored reference image, correct a background image corresponding to the background from the photographed image based on the obtained correction data, and control the communicator to output the corrected background image on the display device.