A display apparatus included in a wall display includes a first input interface, a first output interface, a second output interface, a plurality of display modules, and a processor configured to, based on an image signal being received through the first input interface, display an image corresponding to a position of the display apparatus on the wall display through the plurality of display modules based on the received image signal, and transmit the received image signal to a first display apparatus and a second display apparatus included in the wall display through the first output interface and the second output interface, respectively.