A first display apparatus includes a detector configured to detect a second display apparatus in proximity with the first display apparatus; a transparent display configured to display an image and receive a user input in an overlapping area of the transparent display, wherein the overlapping area is in proximity with the second display apparatus; a communicator configured to form a communication link with the second display apparatus when the second display apparatus is detected, and transmit, to the second display apparatus, a request related to an object corresponding to the user input via the communication link when the user input is received; and a controller configured to obtain data corresponding to the request via the communicator.