In 2007，China’s economy experienced high speed development，as well as in the capital price，and GDP was with a year-on-year growth of 11.5%. As the over-speeded increase of capital price and unpredictable hot money flow，also with the effect of exchange rate reform on entity economy released gradually，all of these result in an unpredictable economic development in 2008. There will be two major factors need to be concerned. Firstly，the fluctuation of domestic capital price，including securities and real estate prices；secondly，the spread of US Subprime Mortgage problem and the potential influences of speed-down US economic growth.