Abstract: It is known that in ligand field theory, the values of parameters with respect to the coulomb, the crystal field and spin-orbital interactions are determined by experimental data. For the purpose of pratical calculations, a program for obtaining the optimal values of parameters is designed. This program can be used effectively to analyse the spectrum of transition metal and rare-earth complex compounds. For brevity, the details of the program will not be presented in this paper. Only the calculation result for the ion Re⁺⁴(5d³) in K₂PtCl₆ crystal is reported.