The bipolar system has been broken since the collapse of the USSR. Relations among great powers were adjusted accordingly. PRC and Russia initiated multipolar system and become "strategic cooperation partners" to resist the "American hegemony ". Through military exchanges between the PRC and the Russia Federation, the modernization of PLA paced faster. The PRC's military capability threatens the structure of Asia-Pacific security, especially to Taiwan Straits. In order to deal with this situation, Taipei should take more realistic actions. First, to protect Taiwan through international multilateralism and collective security system. Secondly, to strengthen the non-military exchanges between Taiwan and Russia. Third, to develop the CBMs between Taiwan and mainland China to remove the anxiety, reduce the enmity and avoid unnecessary conflict from misunderstanding. Last, Taipei should keep self-defense capability for deterrence if PRC is still unwilling to give up military actions toward Taiwan.