Using EO-1 Hyperion hyperspectral remote sensing data, the shallow-water bathymetry inversing in Hainan Island is studied. The key techniques in inversing the bathymetry are retrieve of sea water diffuse attenuation coefficient and classification of seabed. Principal component analysis method is used for seabed classification. The diffuse attenuation coefficient Kd is derived by using QAA algorithm which performs well in optical deep water. Kd obtained from QAA needs to be corrected in some coastal areas with optical shallow water and calculated by direct inversion based on radioactive transfer theory to obtain the bathymetry. It is concluded that the water depth derived from direct inversion can match with the marine map.