TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Parameters: The temperature of the fuel cell is higher than the first reference temperature and equal to or lower than a second reference temperature, and the control unit allows the fuel cell to use the hydrogen gas for power generation by supplying the hydrogen gas from the hydrogen tank to the fuel cell through the first passage, and heats the fuel cell by supplying the hydrogen gas from the hydrogen tank to the hydrogen adsorbing alloy tank through the first passage and the second passage so that the hydrogen gas is adsorbed in the hydrogen adsorbing alloy tank with generation of heat, and transmitting the generated heat to the fuel cell by the heat exchange medium in the heat exchange unit. The temperature of the fuel cell is higher than a third reference temperature that is higher than the first reference temperature. The first reference temperature (T1) is 0degreesC, the second reference temperature (T2) is 30-50degreesC, the third reference temperature (T3) is 50-80degreesC, and the fourth reference temperature (T4) is at least 80degreesC. The circulation path of the heat exchange medium in the heat exchange unit is configured to minimize an amount of the heat exchange medium circulating in the fuel cell and the hydrogen adsorbing alloy tank. The hydrogen adsorbing alloy is an alloy which is more likely to adsorb the hydrogen gas as an internal temperature of the hydrogen adsorbing alloy decreases, and is more likely to discharge the hydrogen gas as the internal temperature increases. It is an alloy which causes an exothermic reaction when storing the hydrogen gas, and causes an endothermic reaction when discharging the hydrogen gas adsorbed in it. During operation of the fuel cell, the control unit is adapted to cut off supply of the hydrogen gas to the hydrogen adsorbing alloy tank and to discharge the hydrogen gas adsorbed by the hydrogen adsorbing alloy to ensure that the hydrogen adsorbing alloy tank has a capacity for s toring the hydrogen gas when operation of the fuel cell is completed.