The U.S. Asia-Pacific policy is at a turning point. The "rebalancing" strategy,structured and implemented during Obama’s first term has produced extensive and sustained impacts, but still needs further adjustment in the evolving situation of the Asia-Pacific region.During the second term, based on re-evaluation of U.S. national security interests and U.S.relationship with countries in the Asia-Pacific region, the Obama Administration carefully modifies its "Asia-Pacific rebalancing" strategy, gives it the obvious character of "convergent security". Under the guidance of "convergent security" strategy, the United States will continue to maintain its bilateral security commitments, and play the leading role through more planning or participating in regional multilateral mechanisms and multilateral initiatives.Shifting from the traditional position of prioritizing bilateralism to equal emphasis on bilateralism and multilateralism in strategic arrangements is considered to be the most realistic option for the United States to safeguard its interests in the Asia-Pacific region under the current domestic political and economic conditions.