The domestic air pollutant emission for 2050 was estimated based on an 80% reduction of greenhouse gases by 2050. With the emission data and future estimation scenarios in mainland China, PM2.5 and O3 concentration were estimated by an air quality model: CMAQ (Community Multiscale Air Quality Modeling System). As a result, it was thought that the current atmospheric environmental quality standard would be achieved for PM2.5, and high-concentration photochemical O3 in summer would not occur. However, as the amount of decrease in O3 concentration in spring was small, it was considered that it would be difficult to achieve an air quality standard of 60 ppb.