NOVELTY - A preprocessing system of raw material comprises guard catalyst part which desulfurizes sulfur content in interflow of raw fuel and steam before arrangement location of modification catalyst of steam reforming device in modifier type, pipe which supplies raw fuel to steam reforming device of modifier type, and flow path of raw fuel which is changed to sulfur compound adsorption agent filling container (81) or higher hydrocarbon adsorption agent filling container (82) according to temperature of steam reforming device.    USE - A preprocessing system of raw material for integrated multiple cylindrical type steam reforming device of raw fuel (claimed) used for fuel hydrogen production of fuel cell.    ADVANTAGE - The preprocessing system prevents performance decrement of modification catalyst and poisoning and deterioration of modification catalyst by sulfur content for a long period of time, suppresses usage amount of higher hydrocarbon adsorption agent, and simplifies control system by utilizing flow volume or time of raw fuel as control element.    DETAILED DESCRIPTION - A preprocessing system of raw material comprises guard catalyst part which desulfurizes sulfur content in interflow of raw fuel and steam before arrangement location of modification catalyst of steam reforming device in modifier type, pipe which supplies raw fuel to steam reforming device of modifier type, sulfur compound adsorption agent filling container (81) and higher hydrocarbon adsorption agent filling container (82) which are arranged in pipe, and flow path of raw fuel which is changed to sulfur compound adsorption agent filling container or higher hydrocarbon adsorption agent filling container according to temperature of steam reforming device. An INDEPENDENT CLAIM is included for an integrated multiple cylindrical type steam reforming device of raw fuel.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the preprocessing system of raw material. (Drawing includes non-English language text).    Sulfur compound adsorption agent filling container (81)    Higher hydrocarbon adsorption agent filling container (82)    Switching valve (83)    Temperature measurement device (84)    Controller (85)