FUEL CELL SYSTEM AND WATER DRAINING METHOD FOR FUEL CELL SYSTEM

A fuel cell system of the present invention includes: a fuel cell (1); a water circulation passage through which water circulates, the water being necessary for an operation of a fuel cell system (100); a separation mechanism configured to divide the water circulation passage into a plurality of blocks when removing the water and to cut the flow of the water among the blocks; water discharge passages respectively connected to the blocks; and water discharge valves respectively provided on the water discharge passages.