FUEL CELL SYSTEM

A fuel cell system includes a fuel cell (34a), a fuel supply apparatus (42e), a flow amount detection apparatus (42c) detecting flow amount of the fuel being supplied to the fuel electrode, a control apparatus (15, 50) controlling at least the flow amount of the fuel supplied by the fuel supply apparatus, the control apparatus including a feedback control portion (51) performing a feedback control relative to the fuel supply apparatus on the basis of a difference (et) between a detected flow amount (Qk) of the fuel and a target flow amount (Qt) of the fuel, the control apparatus including a storage portion (52) including a first map (52a) indicating a first correlation (C1) between the target flow amount and the control command value for each type of the fuel, and the control apparatus including a fuel type estimation portion (S110) estimating the type of the fuel.