The urban atmospheric environment is examined with the air pollutant monitoring data and the daytoday data from the outpatient service of the Nanyang Central Hospital between 2004 and 2005 year, as well as the conventional meteorological data from 1971 to 2007 at Nayang Weather Station. The statistical analysis is conducted of haze weather and air pollution characteristics at Nayang and the influence of haze weather on humanbody health, based on the medical records of the hazerelated outpatient service. The results indicate: there was obvious interannual variation in the number of haze days at Nanyang, and there was an increase trend in either occurrence frequency or duration of haze weather in the recent 37 years; haze weather occurred more frequently in autumn and winter, and the haze weather worsens air pollution, specially when PM10 density increases greatly in haze weather; the clinical rate of respiratory diseases increases obviously in haze weather. The analysis demonstrates that the number of respiratorydisorder outpatients and PM10 density are correlated positively, namely the PM10 density increases along with the increasing respiratory disorder outpatients.