The light emitting diode (LED) chip spectrum inspection is a keytechnology in LED chip scaled manufacturing. According to the principle ofspectrum inspection and aiming at the demand of applications of LED chip spectruminspection, the present paper studies the spectrum acquisition system based oncomplex programmable logic device (CPLD). The CPLD, the main chip, provides theworking timing signal to the linear charge coupled device (CCD) and controls thesignal modulating, conversion and storage, and transmission of sampling rate anddata in transfer module. The system adopts raster monochromator as prismaticparts of apparatus and linear CCD as photoelectricity conversion parts to inspectthe opposite spectrum energy distributing curve, and meanwhile calculate thespectrum parameter of LED chip photics characteristic. Based on the CPLD , theLED chip spectrum acquisition system with the virtues of simplicity and celeritysatisfies the precision request of LED chip spectrum inspection.