The high-accuracy laser and infrared ray interference material test system are designed to overcome the thermal image system's shortcoming of low resolution of temperature. The light sources of the test system are 1.06 μm wavelength LD and 3-5 μm and 8-12 μm wavelength infrared radiation plate and it is modulated with a 12 Hz mechanical chopper. The sensors are PIN and pyroelectricity sensors with optical filter. The optical receiver system is a 0178 mm Cassegarain optical system. The software is programmed in NI measurement studio, and some digital signal processing method like FIR band-pass filter and AR power spectrum are used to process the optical signal. This system's resolution is better than 0.5% and its accuracy is better than This system also supplies a complete experimental data analysis and statistic functions.