Based on the data of real estate investment and gross domestic production (GDP) of each province from 1997 to 2007, this paper tries to analyze the relationship between them by using Cointegration Test and Granger Causality Test.The research reveals that there is a long-term interaction between real estate investment and gross domestic production.Expanding real estate investment could stimulate the growth of gross domestic production, and the changes of GDP will also have effect on real estate investment.