Ocean-atmosphere interaction plays a dominant role in the Earth System Model (ESM) and ocean climate. This course will review the background and physics of ocean modeling, ocean turbulence and parameterization, ocean sea-level and air-sea interaction over fronts/eddies from the aspects of regional and global models. The most state-of-the art research of ocean-atmosphere interaction and recent progress of ocean climate research, including modelling sea level variation and ocean decadal variability, will be further addressed.