Radioactive aerosol concentration calculation method and system

The invention discloses a radioactive aerosol concentration calculation method. The method comprises the following steps: S1, calculating and dividing a dynamic range of an energy region based on a dynamic stable spectrum; s2, counting values of an artificial alpha region and an artificial beta region are calculated based on the dynamic range of the energy region; and S3, calculating the activity concentration of the artificial alpha nuclide and the artificial beta nuclide of the aerosol in the environment based on the count values of the artificial alpha region and the beta region. The invention also discloses a corresponding system, which is a method for calculating a dynamic energy scale coefficient through a natural radon thorium daughter characteristic peak, estimating the trailing count of natural alpha in an artificial alpha range by using a four-compensation method and a Gaussian trailing function fitting method adaptive switching mode, and calculating the activity concentration value of artificial al