Wavelength scaling law for the yield of high-order harmonic emission is theoretically examined for excited state atoms which are optically prepared by simultaneously exposing to an extreme ultraviolet pulse at the resonant wavelength and an infrared pulse at a variable wavelength in the range of 0.8μm-2μm.Numerical simulations are performed based on the three-dimensional time-dependent Schr(o)dinger equation (3D TDSE) in Neon.We confirm that the harmonic yield follows a λ-(5-6) scaling with the single fundamental driving laser pulse; whereas for the optically prepared excited state atoms, a λ-(2-3) sealing for the harmonic yield is revealed.