21th century, PRC'S Air Force has been achieved national defense and military modernization by leaps and bounds. Implement adopt a system of combining aviation with ground-to-air defense forces. Promote the core of military capabilities. Ability to accomplish diverse military tasks. Assume winning for local war in informatization condition and complete "non- war military operations〞Dual task responsibility. Situ geo-strategic terms, PRC'S Military Strategic objectives backing accomplish of strength base oneself on Asia-Pacific regional hegemony. Our country will form a larger military threat on the survival and development of the Asia-Pacific geo-strategic environment. We want to grasp Evolution of PRC'S Air Force strategic cogitation,and the effectiveness of the process of modernization. Purpose of this study, attempts to study the inspection certificate the following questions: Primary, review the period of China president ideology in response to national strategies developed by the international situation. PRC'S Air Force the progressive realization the offensive and defensive process. Second, against push forward PRC'S Air Force leaping development and discussed establish joint operations strike capability. finally, discussed the possibility of warfare military conflict in the Taiwan Strait, defense should have the Countermeasures.