Anthropogenic reasons such as biomass burning smoke and industrial pollution generated with industrialization can change the property of aerosols. In order to analyze the air quality of countries in different development levels we select four countries (Brazil, China, Australia, Canada) and four city groups (Sao Paulo, Beijing-Tianjin-Tangshan, Sydney, and Ottawa) in each country as our research region and the 2000-2012 monthly mean AOD 550, Dust AOD 550, FM AOD 550, ANG 550_870 of these regions are also displayed. The result shows that high AOD area is located in Southeast China, North Brazil, and Northeast Canada and AOD has gradually increased in this area from 2000 to 2012. ANG 550_870 in China, Brazil, and Australia is increased as a whole, where the particle diameter is decreased. AOD 550, Dust AOD 550, FM AOD 550, ANG 550_870 of Sao Paulo, Beijing-Tianjin-Tangshan, Sydney and Ottawa city groups have seasonal and yearly law and the air quality order of this four regions is Sydney > Sao Paulo > Ottawa > Beijing-Tianjin-Tangshan region.