An atmospheric chemical model has been coupled with a regional climate model in order to simulate the regional climate and ozone in troposphere over China. On the basis of the modeling, it has been found that East Asia monsoon is one of the dominant factors that can deeply affect ozone distribution in troposphere. The ozone in troposphere can be affected by other factors such as complex terrain and pollutant. The radiative forcing at the top of atmosphere of clear sky has also been explored with the chemica...