Abstract: The rendering of large-scale ocean wave scene is one of the most challenging tasks in computer graphics.A method for real-time realistic rendering of ocean wave scene is proposed.By the method,a grid of concentric circles is developed to replace ocean surface geometry.The fast Fourier transform method based on GPU is used to generate the height map,then the choppy wave is simulated and the repeating tile of ocean surface becomes not apparent.The techniques for simulating light reflection are adopted,including cubic environment map,planar reflection map and Phong highlight.The water depth has been considered to simulate light refraction of ocean surface.Finally,the evolution of foam and the shadow of the object above ocean surface are rendered.The method has been applied successfully in the scene of marine simulator.