A head mount display and method for outputting an output of the same are disclosed. The method includes outputting a first task from the head mount display, the first task including at least one of a first video output and a first audio output; recognizing a portable device, which outputs a second task including at least one of a second video output and a second audio output; determining whether the first and second video outputs are swapping targets, if the portable device is recognized; swapping the first video output with the second video output if the first and second video outputs are determined to be swapping targets; determining whether the first and second audio outputs are swapping targets, if the portable device is recognized; and swapping the first audio output with the second audio output if the first and second audio outputs are determined to be swapping targets.