The problem of the development of water waves by wind has still many ambiguous points. These ambiguities are caused by the complexities of phenomena, and physically the interaction of surface waves and air flow and occurrence of breaking of waves are reserved as difficulties for the understanding of the accurate mechanism of wave development. At the present the comprehensive computations are presented by O. M. Phillips (1957) and J. W. Miles (1957, 1960, 1962) (improved in some points by T. B. Benjamin (1959)) for the explanation of the linear interaction of waves and air flows, and the treatment of J. W. Miles has been received as a gool intre interpretatiom of physical phenomena(M. J.lighthill (1962)) His theory is a linearized instability one which is similar to the computation of hydrodynamic instability of parallel shear flow.