Wave feature of a classical physical system demonstrates more efficiently than its relevant particle feature during information processing procedure. By analysis of wave and energy features of a classical coupled harmonic oscillator system,it was proved that Grover's quantum unsorted search algorithm can be implemented in such a classical system,which had almost the same efficiency as the fully quantumones. Meanwhile,the better stability of wave implementation of information process compared to quantum computation was discussed. Furthermore,the application of “ energy focusing ” feature of the classical coupled harmonic oscillator system was prospected.