The Gauss functions were first adopted fo fit the square of the functions of the hydrogenlike atomic orbitals

and then the functions so obtained were used as the density basis functions to fit the electrodensity function in molecular. To calculate the coeffictients and exponents of the Gauss functions

and calculate the charge distribution of molecules

we designed the corresponding program to solve a series of intergral problems. A series of organic molecules were calculated with that program and got the atomic electronic population further the net atomic charge in some molecules were obtained.The calculated results show that there is evidently polar alternating property in nonconjugated system as conjugated systom. That the energy of organic molecule system waseffected by inductive effect was explained with the calculated results.