Atmospheric tublenced optical wave front could be represented with ZernikePOlynomials suggested by Noll. The detector response matrix R for the first n terms ofZernike POlynomials hat been obtained from irradiance distribution in two de focal planes.For a random waveftont, with matrix R and the irradiance diStribution detected, it is easyto solve the correspollding coefficientS of each Zernike POlynomials and reconstruct theinput wayefront. By means of ray tracing, the principle and feasibility of this novel method have been verified by computer simulation.