Sixty percents of people in the world live in Asian area, and their economic activities earn twenty four percents of the total GDP all over the world. As the population increases and the economic activities, emissions of sulfur oxides and nitrogen oxides from combustion are increasing and the emissions cause not only local pollution but also global environmental pollution.
It is important to calculate the concentration of sulfur oxides that is emitted from the stack of large point sources. In this paper, a software package was developed to calculate the diffusion of sulfur oxides which is emitted from Asian large point sources by using the Japanese air pollution model, and this package was applied to diffusion problems by large point sources China, Korea and India's. The result is displayed as figures with GIS and the diffusion in each country was discussed.