Only the internal combustion engine (1) of a hybrid automobile is heated using the thermal energy stored in a heat storage (16) if the amount of heat stored in the heat storage (16) is equal to a judgment value MJ or more when the system of the hybrid automobile is booted up. As a result, the temperature of the internal combustion engine (1) increases above a permission temperature at which the intermittent control of the engine (1) is permitted, and the intermittent control is performed early after the system is booted up. The viscosity of the oil in the engine (1) rapidly falls, and the drive resistance of the engine (1) lowers. If the amount of heat stored in the heat storage (16) is below the judgment value MJ, the transaxle (12) is heated under a predetermined condition using the thermal energy stored in the heat storage (16). Thus, the fuel consumption of the engine (1) is improved.