Equity concentration of prevailing complex compounds were defined by analyzing of the ionic equilibria in the system «Cd2+ - L - N2H4CS», where (L - NH3, H2NCH2CH2NH2, (NH3+ ). It was found that the maximum degree of supersaturation in the reaction mixture is matches to system containing the citrate ions and the minimum when ethylenediamine was used. The regularities of the surface topography of cadmium sulfide thin films synthesized from aqueous solutions with different ligands were identified. Connection between the surface development and set of ligand, which inputs into solution was established by scanning electron and atomic force microscopy.