A display apparatus includes a display panel on which an image is displayed, a receiver configured to receive an image signal related to the image from an external device and a controller configured to change an image processing mode of the image based on a change in a vertical frequency of the image signal. The display apparatus according to an embodiment has an effect of providing a more vivid image to a user by changing the image processing mode of the image based on the change in the vertical frequency of the image signal received from the external device.