Abstract: The air quality impact in Beijing,which will result from the pollutants emissions of the "Thermal Power Planning for the Northern Passageway of the West-east Power Transfer Project",has been predicted by ATMOS long-distance transfer model.The result from the prediction shows:during the Tenth Five-Year Plan Period,contribution from power plant sources to SO\-2 annual concentration of Beijing will decrease by 0.26 μg/m~3,and the annual concentration of fine particle will increase by 1.45 μg/m~3;during the Eleventh Five-Year Plan Period,SO\-2 annual concentration will increase by 0.47 μg/m~3,and the annual concentration of fine particle will increase by 0.94 μg/m~3;and the particulate impact is mainly due to secondary particulate.