By using the radiosonde and surface observation data of Fuzhou,eleven surface meteorological elements and nine atmospheric stratification parameters which affect the density of atmospheric pollutant were calculated.A series of regression equations were built with them and the density of SO₂、NO_x and TSP during the period between 1995 and 1998,and then the grade of pollutant′s density was forecasted daily by using the equations from Feburary to August of 1999.