An image display apparatus and an operating method thereof are provided. The image display apparatus may be connected to an image processing device and include a memory storing one or more instructions, and a processor configured to execute the one or more instructions stored in the memory to: create a table including physical address information of each of at least one source device connected to the image processing device and device identification information corresponding to the physical address information; display a user interface including the device identification information included in the table; and change to an input mode of a source device corresponding to device identification information selected in response to a user input to select device identification information, based on the physical address information corresponding to the selected device identification information.