Beach nourishment project, involving both beach nourishment and submerged sandbars construction, will be carried out on Tiger Rock Beach. Based on finite volume method, the software Mike 21 is employed to establish a 2D flow and wave model of study area. Simulation results of the models are minutely verified by a comparison with the measured hydrodynamic data in 2011. Furthermore, the model efficiency is evaluated. Results show that the computation processes of tidal level, current coincide fairly well with field data, and with a high accuracy. This paper focuses on the influence of beach nourishment project to the surrounding current and wave. The levee of the submerged sandbars, where is the largest variation of velocity and significant wave height occur, is an additional sand source for artificial filled sands backyard with the long term dynamic loads. For the weak current and little wave change, the beach nourishment combining artificial filled sands and submerged sandbars is advantageous to save filled sands on the beach.