The goal understands the room air pollution the degree and to the human body health influence. The method October, 2007 to December, to the Dongguan Wan city some plot's 50 varying degree repair, housing less than a half year housing, carries on many item of air pollution target monitor, and to 120 family members has carried on the inquiring survey. Finally the carbon monoxide exceeds the allowed figure more than 1 time; The carbon dioxide exceeds the allowed figure 12 times; The formaldehyde exceeds the allowed figure more than 40 times; The benzene, the toluene, the ethyl benzene, the xylene exceed the allowed figure separately 8-13 times; The bacterium target surpasses standard times. In 120 by the investigation object, some 80 bodies appeared the bad symptom. In the conclusion room air the formaldehyde pollution is most serious, moreover the indoor spatial pollution is harming human body's health directly.