This paper focused on Zheng Guanying's ideas about westernization movement in late Qing Dynasty.Zheng Guanying put forward ”Commercial War” to develop national industry and commerce to resist the great powers' economic invasion.The paper consists of three parts: Zheng Guanying'sAdvocacy on westernization movement, his criticism and his suggestions for westernizations movement.The research method for this paper uses historical document analysis. The purpose of this paper is to analyze Zheng Guanying's viewpoints, so we can understand more abiut his keen insight, be enlightened by his thought, learn the academy research and national policy making in the future.