Abstract:Taking the river and lake management and protection in Yantai as an example, this paper briefly expounds the changes in the philosophy, system, and mechanism of river and lake management and protection in Yantai since the full implementation of the River and Lake Chief System. It summarizes the main practices and achievements of river and lake management and protection under the framework of "Three managements, Three controls, and Three transformations, "and discusses and prospects for further strengthening the construction of "management by law, improvement by intelligence, and collaborative cooperation, " enhancing joint efforts, and promoting integrated development to improve the quality and efficiency of river and lake management and protection, aiming to provide references for the work in various regions.