Abstract: This article discloses the existing of the Pan-Valley and describes the characters of it,on the basic of which,the definition is induced to expound this hydrographic phenomenon.By bringing forward to some indexes such as river contribution rate,harmonious rate,water resources available rate,etc.,the me thods through which to manage the water resources are evaluated and the significance is obvious.At the end of the article,the author gives some suggestions that the study of the essential of the river should go fatherly,the categorized study should been carried out immediately,and the harmonious and continuous development is the only way for the better utilization of the water resources.