This paper describes the familiar ways for the energy saving of the municipal water-supply systems and the basic methodologies for the optimal pump operations. A recommendation of the most-used nonlinear programming and the lately developed genetic algorithm of the water distribution systems is also provided. Advantages and disadvantages of each approach are presented

along with the comment of the corresponding applications.At the last part of this paper

the author puts forward his suggestions

at the basis of the summary and conclusion of energy saving and optimization of the municipal water-supply systems.Through this paper

the author hopes to review the state of existing ways and methodologies of the water-supply systems

and to recognize the future work that for us to do.