The present invention relates to a method of effectively setting an external device to perform an interlock function in a multimedia system of a vehicle, and a vehicle capable of performing the same. A method of controlling a multimedia system of a vehicle that performs an interworking function with a connected external device according to an embodiment of the present invention includes: connecting to at least one external device; Determining the number of connected external devices; Setting the one external device as a basic device to perform the interlocking function if the determined external device is one; Displaying a pop-up window for selecting one of the plurality of external devices on the display if the determined external device is a plurality; And setting an external device selected through the pop-up window as the basic device.
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