After the grand election in 2008, Ma Yingjiu was elected as the “President” of Taiwan and have terminated Chen Shuibian era, who advocated Taiwan’s independence from China. Ma advocates a moderate policy toward the Cross-Straits Relations which toke an positive effect on Cross-Straits Relations both politically and economically. On 4th. Nov. 2008, China-Taiwan Three Direct Links Agreement was signed which may works as the milestone for the Cross-Straits Relations and gives a great impact on Cross-Straits Tractions. This paper analyzes the legal issues under WTO system which came With the development of Cross-Straits Relations and Trade, and toward the expending Cross-Straits Trade relation, this paper also elaborated the possibility for China-Taiwan FTA or CEPA under “One China Principle” and the impact that may work on China-Korea FTA.