The present research is devoted to the cationic-deficient SrMoO4-based sheelite-related complex oxides. The doping with bismuth to A sublattice and codoping with bismuth and vanadium (to A and B sublattices, respectively) were discussed. The X-Ray powder diffraction and infrared spectroscopy were used to investigate structural characteristics of the complex oxides. In Sr1-1.5xBixMoO4, a superstructural ordering was observed. Conductivity and dielectric loss of ceramic samples are measured using alternating current.