A raised floor system for suspension type pipelines mainly comprises girders and floor units laid between foot stands after the foot stands are erected at intervals on the floor, such that floor units are separated from the floor by a distance to form a large-area raised floor, wherein a top portion of each foot stand for the floor units to be placed thereon is combined with a cover, of four sides of the cover each is vertically provided with a folded plate, a hole is formed on the folded plate, two ends of a suspension device are capable of being respectively hooked on the holes of the folded plates of two of the spaced foot stands, so that the suspension device is placed under the floor units for pipelines to be placed thereon or fixed thereto.