Based on the ocean surface microwave scattering property and its Synthetic Aperture Radar (SAR) ocean surface imaging mechanism the main research of ocean dynamical SAR detection is presented in this paper. Passing the statistical and hydrodynamical analyses of generation mechanisms of ocean internal waves and ocean bottom topographic waves as well as ship wakes their important SAR imaging features and deducing parameters are here discussed. Therefore the SAR application of oceanic observation is promoted.