Various power estimation methods with high-level hardware power model, i.e. power emulation, had been proposed to overcome the slow speed of traditional power estimation in software environment. But precise speed comparison between gate-level simulation and high-level power emulation was conducted rarely. In this paper, we propose an architecture of power emulation which can compare precise speed gain against the traditional power simulation. Experimental results show that the average power error is 0.29%, the power emulation analyzes power 20,206 times faster than the traditional power simulation.