Real estate prices rose has become an grievances, Besides, the international economic situation has also undergone a major change, after the financial crisis, the European debt crisis to the quantitative easing policy, real estate prices have been affected. Changes in the overall economic factors will affect real estate prices, general economic factors in this study through the surface, analyze the data for the first quarter of 2001 to the fourth quarter of 2013, observing Taipei, New Taipei City, Taichung City. Through smooth migration model nonlinear methods to money supply growth rate, the five banks that undertook the mortgage rates, consumer price index growth rate and economic growth rate as the explanatory variable, and the five banks that undertook the mortgage. By the overall economic factors which impact on the real estate price index changes. Empirical results show that the interest rate is less than the threshold value, or when near threshold, this three real estate prices and mortgage rates were significantly correlated with the government may be observed whichever interval between mortgage interest rates, conducted for the regulation of interest rates, by This impact of money supply on the market, while raising or lowering the cost of capital by individuals and businesses, the use of cost of capital controls, to be regulated in different parts of the housing market.