Abstract: The present invention relates to a vehicle comprising: a third control unit for sensing the gear being placed into a parking mode and the removal of an ignition key; a control unit including a temperature-setting part for setting a temperature for a cooling or heating operation, a second sensor for sensing whether or not an indoor temperature has reached the temperature for the cooling or heating operation, a selection switch for enabling a user to select a cooling mode or a heating mode, and an operating switch for operating a cooler or a heater in accordance with the selected cooling mode or heating mode; a main battery for storing power generated by a generator; a first auxiliary battery and a second auxiliary battery for storing surplus power of the main battery; a first control unit interconnected between the main battery and the first and second auxiliary batteries so as to selectively supply the surplus power of the main battery to the less-charged side of either the first auxiliary battery and the sec