Abstract: Considering the CPI,exchange rate and depreciation,this article measures the cumulative quantity of total capital and foreign direct investment(FDI) in China.Under the precondition of the positive correlation among the technological output and technological level,FDI quality and the technology level of home country,we give measures of the output and impact of science and technology,which replace technology level of home country to valuate FDI quality,and this paper presents an order of FDI quality of the main sixteen regions.In addition,as to the issue of the strategy choice to absorb FDI in China,we advocate the standard that to absorb FDI should transfer the for eign technique into Chinese capitalenter prises in order to make up the technology gap of China.

Key words: foreign direct investment(FDI), quality valuation, technology gap