In this paper the seasonal and diurnal (in winter and autumn) variations ofboth ground-level and low-level inversion in the urban districts of Changzhou is analysed by using the data obtained from January 1984 to the spring of 1985 in Changzhou.The spatial distribution of air pollutant concentration in winter is examined, based onthe SO₂ and aerosol concentration data from airplane and low-level sounding on January 8, 1987. Photographs which display the "bulb-shape" and "vertical passage" areconstructed by using ground multi-band photography and image processing techniques.