This paper proposed the a integrated technology of energy saving and environment protection (ESEP) and a process route of efficient flue gas treatment technology, according to the main future development layout and available energy saving and ESEP technology for ultra supercritical coal-fired units in China. The efficiency of ultra supercritical unit and the development trend of efficient flue gas treatment technology were analyzed for the future ten years in China. The result shows that the integrated technology of ESEP and the process route of efficient flue gas treatment technology should be different according to the characteristics of different regions in china.