The material design and synthesis are of important to modem science and technology. Here, we report the synthesis of multifunctional nanomaterials with different properties: feroelecties YMnO_3 and multiferroic materials such as CoFe_2O_4-YMnO_3,;Fe_3O_4-YMnO_3,;CoFe_2O_4-Cd_0.85Zn_0.15S,;and;Fe_3O_4-Cd_0.85Zn_0.15S nano-composites by using a chemical synthesis process. These results provide a simple and convenient synthesis process to produce multifunctional nanocomposites.