Abstract: A fog smoke-filtrating and muffling device utilized by vehicle is an apparatus utilizing an intake pipe to lead the waste gas of engine to blow the water, which is contained in a tank, to disperse to become a fog. The carbides and impurities in the waste gas can be dissolved in the water. Then, in a evaporation chamber and a releasing chamber, the water droplets and waste gas can be separated from each other, and the purified waste gas is exhausted. The water droplets can be collected and filtrated through a reservoir. The water in the reservoir can be used again. Meanwhile, the water in the tank of this invention can absorb the noise and the shock of engine. The cyclic flow of water in this invention can cool the engine as well.