Indoor　air　quality　(IAQ)　has　been　concerned　since　1970s　in　some　western　countries.　Many　researchers　have　studied　the　effects　of　air　pollution　on　children＇s　health　and　evidence　suggested　that　it　did　contribute　significantly　to　the　risk　of　adverse　health　in　children.　Children　spend　the　majority　of　their　time　indoors,　mostly　at　home.　To　study　health　effects　of　long-term　exposure　to　indoor　air,　we　conducted　a　questionnaire　survey　about　indoor　environment　and　children＇s　health　status　in　2012　on　the　4-5　grades　children　of　a　primary　school　in　Beijing.　The　questionnaire　was　used　to　collect　data　on　general　information　of　children,　living　environment,　residential　equipments　and　lifestyle　and　children＇s　health　status.　We　classified　the　investigated　families　into　several　categories　according　to　residential　surrounding　air　pollution,　decoration　and　smoking.　Then　we　observed　respiratory　symptoms　like　cough,　dyspnea　with　phlegm,　nasal　obstruction,　asthma　and　some　allergy　symptoms　in　different　categories.　The　results　of　this　survey　suggest　that　indoor　air　quality　is　associated　with　children＇s　health.　Morbidity　of　children＇s　respiratory　system　symptoms　and　some　allergy　symptoms　is　higher　in　relatively　poor　indoor　environment.