"Zhu Zhiwu induced Qin's Troops to Retreat" was a famous and successful diplomacy affair in the Spring and Autumn Period of ancient China. It was recorded in the Chun-Qiu Zuo Zhuan. The first, by passing compared with Xin Xu, there were lots of important background was hided in this historical event. By used analysis way of informal logical, we could understand more hidden details in this historical event. At the same time, Second, I would use the "Diagrams Model of Argument" which was an analysis technique widely used in introductory logic and informal logic and tried to reflect actual argument in inclusive of the complicated relation in statements to analysis this historical event and try to find some new approaches to realize those historical diplomacy cases.