SO2 & NOx in flue gas can be removed by electron beam, and composes some byproducts of (NH3)22SO4 and NH3NO3 under injecting NH3. The advantages of the technology are not byproducts of pollutant and lower fee of facilities and operation compared with normal FGD technology (GaO-CaSO4). Most power station is used by coal in China, there are total amount of 2000 tons of SO2 pollution in flue gas discharged out in the air. So the R & D of reduction SO2 & NOx by EB is signification.