Membrane-lime 12-molybdophosphoric acid-blended polymer(polysulfone or polyphenylene oxide) film catalysts were prepared by blending two materials using common solvent(dimethyformamide) or using mixed solvent(methanol-chloroform), and the effects of solvent on the catalytic activities of the film catalysts were examined for ethanol conversion and 2-propanol conversion reaction. The film catalyst prepared by using common solvent showed a lower acidic activity and a higher redox activity than 12-molybdophosphoric acid, whereas the film catalyst prepared by using mixed solvent showed a lower or similar acidic function and a higher redox function than 12-molybdophosphoric acid. It was found that the enhanced redox activity of the film catalysts was mainly due to the fine dispersion of the catalyst through polymer films. The acidic function of the film catalysts was strongly affected by solvent, polymer material, and blending patter(physical blending of physicochemical blending). It is concluded that heteropoly acid-blended polymer film catalyst can be designated to meet he need for the selective oxidation reaction by using basic common solvent or by using mixed solvent.