Abstract: Hydrology is the basis of the science of water resources.As the science of water resources going forward,it sets freqently higher and new demand on hydrology,and hydrology makes further advances on itself in giving more effective cooperation with the science of water resources.The science of water resources and hydrology are going forward along their own way of development respectively.Conseqently they can promote development mutually so that they can be interdependent each other and make progress together.