NOVELTY - The fuel reforming system (15) has modifier (20), high temperature impurity removal unit (44), low temperature impurity removal unit (40), mixed gas introduction path (I), mixed gas introduction path (II) connecting the high temperature impurity removal unit and low temperature impurity unit, and purified gas supply path.    USE - For supplying generated hydrogen to hydrogen consumption apparatus (claimed).    ADVANTAGE - The fuel reforming system efficiently removes the impurities from the reformed gas in a reduced time.    DETAILED DESCRIPTION - The fuel reforming system has modifier, high temperature impurity removal unit, low temperature impurity removal unit, mixed gas introduction path (I), mixed gas introduction path (II) connecting the high temperature impurity removal unit and low temperature impurity unit, and purified gas supply path. The hydrocarbon group fuel is modified in the modifier to generate hydrogen-containing reformed gas. Impurities other than hydrogen from the mixed gas containing hydrogen are removed by the high temperature impurity removal unit operated at a predetermined temperature. The impurity from the mixed gas are removed by the low temperature removal impurity unit at the time of starting of fuel reforming system operated at a temperature lower than the predetermined temperature. The reformed gas is introduced as mixed gas into the high temperature impurity removal unit or low temperature impurity unit by the mixed gas introduction path (I). The gas passed through an impurity removal unit is introduced with respect to other impurity removal unit of the high temperature impurity removal unit and low temperature impurity unit, by the mixed gas introduction path (II). The purified gas is induced to hydrogen consumption apparatus by purified gas supply path.    An INDEPENDENT CLAIM is also included for generation of hydrogen.    DESCRIPTION OF DRAWING(S) - The figure shows the explanatory drawing of a fuel cell system equipped with the fuel reforming system. (Drawing includes non-English language text).    Fuel cell system (10)    Fuel reforming system (15)    Modifier (20)    Low temperature impurity removal unit (40)    High temperature impurity removal unit (44)