AbstractAir pollution in modern city is very important for people's health and environment management. In order to improve air quality forecasting and air pollution simulation in China, this paper gives a method of analyzing and evaluating air pollutants ozone using the Community Multiscale Air Quality modeling system. The experiment results clearly show the time serious of ozone concentration at the given area and its spatial distribution at the given time. This method can be applied to other oxids of nitrogen pollutants, and help us to control air pollution in China.