As a main part of the water science and technology, hydrologic science and technology have played an important role in promoting water conservancy development and national economic construction in China. Along with the development and progress of hydrology, water conservancy and national economy, the science and technology of hydrology have got great achievements, of which some have reached or neared to the international advanced level. This paper summarizes the important achievements from the hydrologic science and technology in China, analyzes the current main problems, and discusses on how to develop the science and technology of hydrology according to the requirements from sustainable water resources for the continuable development of the society and economy.