The development history of hydrology is an intersection of hydrology and history, and is the development process of hydrological science. At present, there are few hydrologists and historians who study it. The development process of hydrology and human development are carried out simultaneously. Since there are human activities, there has been the application and summary of hydrological knowledge. It can be seen that the development history of hydrology is long and the beginning is early. It is of great significance for a hydrologist to know and understand the development history of hydrology.<br>