In the first half of 2009，Taiwan economic situation was still stern，without seasonal adjustment，the economic growth rate still had depression of 10.13% and 7.54% respectively in the first and second quarters. But since June，the data issued by the competent department of economy showed that，the international trade has gone prosperous and the price fluctuation has slowed down gradually，but the private consumption expenditure is still conservative，the investment keeps downturn，and the public expenditure is still the main support of economic growth. Through the assessment of the influence of ECFA signed Cross-Taiwan straits to the Taiwan economy，the studies of Chung-Hua Institution for Economic Research based on the GTAP model showed that，after signing ECFA，Taiwan’s GDP，import and export，terms of trade and social welfare all have presented positive growth，the whole economic growth rate will increase 1.65%-1.72%，total employed population will increase 257000-263000，which have obvious positive benefit to the overall economy.