Abstract: Due to the deficiencies of current schemes in the aspecct of energy consumption efficiently, this paper proposes a novel Multi-Radio Channel Searching Scheme (MRCSS) based on Partially Observable Markov Decision Process (POMDP) in rayleigh fading environment. This scheme can obtain the optimum energy-efficient channel through analysis and derivation of channel state and thereby conduct unliecense users channel selection. The simulation results show the proposed scheme can reduce the searching time and save the energy more efficiently than the classical methods, so as to improve the spectrum sensing performance.