To apply the new generation infrared detector successfully, it is necessary to design dual-band/multi-band optical imaging systems. A calculation evaluation method to select materials for dual-band infrared optical imaging systems is proposed. The criterion includes the absolute lens power and the average defocus evaluated at a number of wavelengths in the designing radiation waveband. Evaluation of all potential combinations of materials by using this method, the optimal combination of materials and the initial focal power distribution for optical components can be obtained rapidly and efficiently. Through analysis and evaluation, ZnS/IG2 is the best two-lens material combination mode for mid-wave/long-wave dual-waveband infrared optics. Ge/ZnS/GASIR1 is the best three-lens material combination mode for mid-wave/long-wave dual-waveband infrared optics. As it is proved that the method is valued through designing and analyzing the combinations detailed. These best combinations can be used as lens elements to provide a good starting point for designing actual optical systems.