Abstract: Through the development of godson-1 microprocessor design,this paper introduces the methodology of power estimation at architecture level and circuit level,and analyses their power models.We run a lot of benchmarks at architecture level,circuit level and real chip respectively,and the experimental results show that the simulation speed at architectural level is nearly 100times or more faster than that at circuit level,and power estimation at architectural level has more error than that at circuit level which depend on benchmark,and the power estimation at architectural level can track with power consumption of real chip with different benchmarks.That proves it is valid of godson-1power model at architectural level, and the architecture level power estimation will be efficient for low-power microprocessor design.