Wind and wave fields are hindcasted for Typhoon Betty (8710), using LAGFD-WIN dynamical wind model end LAGFD-NWM third genezation wave model.The results are satisfying, which validates the models and shows their reliability for strong sea state.An idea is brought out that wind input source function should be improved, including the effects of wind guatness and wave age factor.The present work makes preliminary preparations for the regional oceanography study of the South China Sea, also provides the technical supports for ocean engineering design.