The air-water coupling model including a three-dimensional atmospheric boundary layer and a three-dimensional hydrodynamic model is carried out to simulate the wind-driven current field in Taihu Lake.As compared with the results of the wind driven current under the action of uniform wind field in Taihu Lake, the results computed by the air-water coupling model appear unsteady.The current speed computed by the three-dimensional hydrodynamic model is higher than that computed by the two-dimensional model, and more coincident with the observed data.In addition, the current direction difference between upper and lower levels can be reflected by the three-dimensional model.Finally, it is concluded that the three-dimensional hydrodynamic model is better than the two-dimensional one in describing the wind-driven current in Taihu Lake.