A display apparatus (1) includes a display (20); a receiver (10) which receives a broadcasting signal including a program with a data format; an image processing part (60) which processes the received program according to an available data format; and a controller (70) which controls the image processing part (60) to display a message informing that both data formats are not matched on the display (20) if the data format of the received program is not matched with the available data format to be processed by the image processing part (60).