Based on the mean values, variances and variation coefficients obtained from the statistical radioactive contents of various stratigraphic units, we can get to know distribution characteristics and migration regularity of radioactive elements, which serve as the basis for geological interpretation of radioactive fields and geological mapping. On the MAPGIS platform, the authors used the VC++ development language to design a computer automatic statistical software for airborne gamma power spectrum parameters on the basis of prior geological data. Such a database can not only make statistics of the mean values, variances and variation coefficients of radioactive elements in every stratigraphic unit but also check the rock naming or boundary accuracy of the stratigraphic units in available geological maps according to the variation coefficients.