Karou is a Neolithic site in Changdu County, Tibet. In 1978, it was excavated by the Cultural Relics Administration Committee of the Tibet Autonomous Region and History Department of Sichuan University. The archaeological report by these two groups focused mainly on the architectural and technical tool remains. The data on housing site column holes caught the author’s attention. This research tries to use quantitative analysis method to explore the architectural remains. Through statistical analysis, the data of housing site column hole reflect the development of the Karou culture. It is suggested that the Karou culture grew from week to strong, and then from strong to week again over a period of about 1000 years. It confirms the lifestyle changes occurring in Karou based on technical tool analysis.