In view of the high precision, multi-function and networking requirements of SGCC for state grid smart meters, a design scheme of three-phase power measurement and quality analysis system based on ADE9000 and STM32 is introduced. ADE9000 is a highly integrated three-phase analog front end. It integrates high precision 24-bit ADC and DSP kernel and implements a variety of high-precision measurement of electrical energy parameters. Under the control of STM32, combined with LabVIEW upper computer, the function of energy metering and harmonic analysis is realized. This paper introduced the overall framework of the system, the hardware circuit and the specific method of software program design in detail. The requirement of high precision and network real time is considered in every design links.