Using the historical data of Singapore population,this article analyzes the change and its causes of Singapore population. The results show that fertility policy adjustment is one of the main cause of Singapore population growth change and structure change,meanwhile,immigration policy is the main engine for Singapore population growth after the 1980s. China is a country that has similar cultural tradition and many similarities in the process of population development with Singapore. Therefore,it is undoubtedly that the historical experience of Singapore population change worth us to ponder.