Abstract: No serious student of geography and climatology can have missed the name of Zhu Kezchen.(CoChing Chu).He was the Vice-President of the Academia Sinica the Former Chairman of the Geographical Society and the Former Chairman of the Meteorological Society.He died on February 7, 1974.Zhu's numerous publications deal with climatic fluctuations, phenology, natural region-alization and history of science.This paper will explain the contribution of Zhu's works to the climatic fluctuations in China. Several of his studies such as the treatises on"The Pulsation of World Climate During Historical Times" (Acta Meteorologica Sinica, Vol.31, No.4, pp 272-288.) and"A preliminary Study on the Climatic Fluctuations During the Last 5000 Years in China" (Scientia Sinica, Vol.16, No.2, PP 226-256, 1973.)have become classic.Owing to the immense labor of generations of workers, China possesses a series of records of natural calamities, such as great floods and droughts, deep freezings and such unsual phenomena, and numerous archeological remains. Zhu, bringing these ancient records into full play, had evolved a number of indirect techniques to obtain these data for indications of the climate of the earlier times.In these papers, Zhu eloquently delineated a coherent and consistent picture of the main tendencies of climatical variations in Chinese history. And he tried to give a 'correlation between the tendencies of temperature in China and the variations in the height of snow line in Norway.He also compared the Chinese temperature patterns to W. Dansgaard's interpretation of 1700 years of the Greenland ice sheet.And so he gave the material objects as evidences for global climatic variations.Not being lost in the labyrinth of numerous annals and gazetteers, Zhu devoted his studies to the needs of the society and to helping the nation to respond more efficiently to climate-induced problems.Chinese researchers will long appreciate Zhu's lifetime study of climatic fluctuations, although he modestly said that he was an elementary student approaching a large topic.Now the vast sources of informations on this topic in China have been tapped, and a great deal of scientific efforts have been aroused.Zhu admitted that he might have shed light on a few problems, but more significant to him was the fact that he had found out many new measurements in the study of climatic changes.