WT5BZ]A universal NIM land surface process (LSP) model is proposed to simulate the energy and mass exchanges really between the land surface and the atmosphere in the arid,semi arid and moist regions. The model is made up of the soil model which has two schemes (five layer and two layer model)in the paper and the isothermal vegetation parameterization scheme presented by Chen Wanlong and Shao Haiyan recently. It is tested by using QXPMEX data from May to August in 1979, and the comparison has been done among five layer model,two layer model in the paper and Deardorff’s model(1978). The result shows that this five layer model is superior to Deardorff’s model and the simulated result is also a little better than that of two layer model.