Spectrometer is one of the most important optical instruments. CCD spectrometer technology is moving in the direction toward miniaturization and even microminiaturization. A design project of intelligent CCD detector specifically for portable spectrometers is proposed in accordance with the features of the portable spectrometer. This detector combines the intelligent control ability of MCU and the accurate and programmable timing feature of CPLD, and integrates with a USB interface to facilitate data acquisition and light integraltime control from the host computer. The design realized a miniaturization, intelligence and integration for spectrometer CCD detector is implemented.