There were various water issues in ancient China. Even officials played an indispensable role, a coordinate pattern had developed as a whole. And the order of using water relied mostly on folk regulations. When water disputes occurred, folk mediation played a major role. So there had been a profound tradition of folk mediation of water affairs in ancient China. Even times condition changes much, the folk mediation has its practical significance at present. Since it changes much in natural environment, technology and social conditions from the ancient times, we should make proper adjustment according to times features and demand.