In this paper, a method of grid real-time data's acquisition and monitoring has been introduced. Take DE1-SOC as a core component, plus a small amount of peripheral device, which can realize the function of system. Furthermore, FPGA is used to complete the electric monitoring of frequency deviation and the sequence of the three-phase power system, ARM9 is applied to monitor the harmonic of power system, by using fast Fourier transform (FFT). To conclude, this system can carry on the monitor to the power grid, found the fault problem timely, efficiently, and ensure power grid operates safely and stable.