With the continuous development of science and technology in China, all levels of society have begun to pay attention to green environmental protection, and higher demands have been put forward for energy conservation and emission reduction, which promotes the application of energy-saving and low-carbon technology in many fields [1] . Especially in the sewage treatment, the rational application of various energy-saving and low-carbon concepts and technologies is of great significance to improve the level of sewage treatment comprehensively. This paper will theoretically and specifically analyze the direction of application, goals and the prospects for development of sewage treatment and low-carbon energy saving.