Guan Zhong was an outstanding statesman and thinker in the early ages of the Spring and Autumn Period.His masterpiece,Guan Zi,gave a detailed illustration on his thoughts.By enganing in the study of Guan Zi,I would like to introduce my views on Guan Zhong's thoughts of city construction, which include city function, classification. density, selection of site, form,arrangement, flood prevention etc.In the article, it is clearly shown that Guan Zhong was the first person who expounded the theory of city construction scientifically and systematically in the history, and made a big contribution to the city construction of ancient China.Guan Zhong was the master of ancient Chinese city planning and construction.