The purpose is to understand that how the indoor air pollution impact on people's Methodology: The investigation was conducted between October and December 2007 in certain community at Wancheng District in Dongwan C 50 apartments of different decorating conditions， which were not resided more than one half year， were monitored for multiple air pollution 120 residents living in the 50 apartments were interviewed face-to- At the end of the investigation， averagely， Carbon Oxide level exceeded the provided standard over 100%， Carbon Dioxide level exceeded the provided standard 1200%， Formaldehyde level exceeded the provided standard over 4000%， the level of Benzene， Toluene， Ethylbenzene， and Dimethylbenzene exceeded provided standards 800-1300%， and bacterium level exceeded provided standards 290% 80 from 120 interviewed residents reported somatic Hereby we draw the conclusion that Formaldehyde is the most serious pollutant of indoor air pollutants， and indoor air pollution directly harm the residents'
