Based on the discussion of the law of the interaction between optic-field and fluid-field, and by using the physical model that high-energy laser beam cross through the two dimension super-sonic free shot flow, the disturbance of the fluid-field which caused by radiation heating and the changing of laser beam′s intensity after the beam passes through the fluid field and propagates a long distance in the static atmosphere are discussed. The results show that there′s a distinctness influence of fluid-field on optic-field. Furthermore, if the interaction of high-speed fluid-field is with high-energy laser, the radiation heating can be neglected.