A technical approach and system scheme for fast high-precision spectral measurement of color appearance are proposed This system is equipped with the modern self-scanning photodiode array devices (SPD) as the photo-electric, the pulsed xenon lamp as the light source, and with tile dual light paths and multichannel configuration. The related function modules of the instrument are designed. As the result of such a photo-electric arrangement, the measurement accuracy is improved a lot and the repeatability is also very satisfactory.