Various embodiments of the present invention relate to an electronic device and an input control method thereof. The electronic device may include: a touch screen display; a wireless communication circuit; a processor operatively coupled with the touch screen display, the wireless communication circuit, and the connector; and a memory operatively coupled with the processor. The memory may store instructions, when executed, for allowing the processor to render a screen including a plurality of icons in a set format when the electronic device is coupled with the external display device via the connector, and provide data related to the screen to the external display device, wherein the screen is adapted with a first relation in which an entire region of the touchscreen display corresponds to an entire region of the external display device or a second relation in which the entire region of the touchscreen display corresponds to a partial region of the external display device. Additional various other embodiments are also possible.