Disclosed are a display apparatus, a method of controlling the same, and a recording medium thereof, the display apparatus including: a display; an infrared (IR) receiver; first and second interfaces; and a processor configured to: identify a remote-control code set corresponding to an external apparatus connected to the first interface, convert a first key code included in an IR signal of a remote controller into a second key code corresponding to the identified remote-control code set, based on the IR signal received in the IR receiver, transmit a signal including the converted second key code to the external apparatus through the first interface, and control the display to display an image based on a signal received from the external apparatus through the second interface.