The ecological hydrology is a science related to the overlapping parts of the ecology and hydrology. Eco-hydrology focuses on studing the relationship between vegetation and water under various environmental conditions and revealing the eco hydrological processes of different plants. In recent years, the development of mathematic models which would be used to model the re actions between plants and water and other eco hydrology models are becoming the important fields in eco hydrology. Besides that, the scale is becoming the seriously problem. Transforming the hydrological and ecological principles and functions obtained in one scale to the other scales could be the most challenge problem in the future. Recently, with the development of researching in the material and energy circulation related to the global change in ecological system, study in hydrological and ecological processes and their interaction along altitudinal gradients and the structure and functions of a ecological system, more and more attentions were paid to the mountain ecological system. During those disciplines, one of the most vigorous fields is to study and develop the multi element dynamic models containing regional climate changes, and make the models have the effectiveness in different scales and various topography or ecological zones.