An electronic device and an operating method thereof are disclosed according to embodiments. An electronic device according to an embodiment includes: a camera; a display; a communication interface; a memory for storing one or more instructions; and a processor that executes the one or more instructions stored in the memory, the processor being configured to: generate an event instructing to display one or more markers on a screen of a display device and transmit the event to the display device; control the camera to capture an image of at least a portion of a wall around the display device using the one or more markers displayed on the screen of the display device according to the generated event; generate a background image to be displayed on the screen of the display device based on the obtained image; and transmit the generated background image to the display device such that the generated background image is displayed on the screen of the display device.