According to the requirements for detecting human biochemical parameters quickly and accurately in field, based on MOMEMS and embedded technology, a micro-biochemical detector test system based on micro-spectrometer is designed. The system includes optical system modules, linear spectral scanning system modules and stepping motor control system modules based on embedded ARM9. And the light intensity repetition experiment of a micro-biochemical detection system is performed. Experimental results show that the system has high detection accuracy, fast spectral scanning speed and low power consumption. Continuous spectrum detection in the range of detection wavelength is realized and application requirements of micro-biochemical detectors are met.