The turbulent exchange characteristics of pollution and clean processes over Guangzhou region are analysed by combined pollutants data with land-air interaction data observed in the periods from May 2004 to August 2005.The analyses focus on the relationship between the surface stability, wind, turbulent energy, mass flux with the pollutants. The analyses show that the relation coefficient between mean wind and mean turbulent energy reach up to 0.9, the larger wind the larger turbulent energy. The relation coefficients between pollutants and mean wind, mean turbulent energy are higher, following by the relation coefficient between pollutants and vapor flux, those above relationships are obvious anti-correlations. The mean wind, turbulent energy and vapor flux in the pollution process are just 0.48,0.59,0.51 times as high as that with clean process, indicating the reduction of unfavour meteorological condition for the advection and diffusion of pollutants by a half, can result in the pollutants cumulation up to 3-6 times. The relations among the pollutants are better in the pollution process, especially the relativity between PM10 and NO2 is higher compared with that in the clean process,in which the relations among the pollutants are obvious weaker, the relativity between PM10 and NO2 is inexistence.