A system for increasing a temperature of a battery includes: an inverter comprising a plurality of legs corresponding to a plurality of phases, respectively, wherein each of the legs comprises a pair of switching elements connected in series to both terminals of the battery, respectively; a motor comprising a plurality of coils corresponding to the plurality of phases, respectively, wherein each of the plurality of coils has one end connected to a connection node between the pair of switching elements included in each leg of the inverter, each leg corresponding to each of the plurality of coils, and other ends of plurality of coils are connected to each other; and a controller generating a battery application AC current applied to the battery by controlling on and off states of the pair of switching elements included in the legs of the inverter.