Abstract:A monitoring system composed of the DSP and ARM dual system is developed,and the design of hardware and software is elaborated.This system uses the DSP to control the synchronous and real-time collection and analysis and calculation of signals,ARM embedded Linux system communicates with the DSP via SPI,to obtain the original data of power quality and transmit the instruction of system,and use the large-capacity storage device to store the local data,and provide the intelligent and friendly interface display and wireless communication capabilities.The test results show that the system has good real-time,high precision,strong expandability,and meet the requirements of indicators.