Through the analysis of annual water balance,based on Budyko Hypothesis,a coupled water-energy balance relationship has been established for the Haihe River basin and inland river basins.The unique parameter in the coupled water-energy balance model shows a significant regional pattern.And it has been proved that this model parameter represents the land surface conditions of the studied catchments.At the same time,the present study has proved the empirical relationship(equation 3) for estimating the model parameter from average slope,the relative maximum soil water holding capacity and the relative infiltration capacity to be of validity in Haihe River basin and inland river basins.