A nation¡¦s military strategy is changes with the integrated environment¡¦s transformation in different time which including international environment, national power and types of war. Two things had happen in the phase from later of 1980¡¦s to early of 1990¡¦s: 1. The collapse of Soviet Union and East European Communist Group that caused the international system became multi-pole system (or one super power and several great power system ); 2. The Gulf War in 1991 that means the type of war started to transform from mechanical war to informational war. In the such conditions. China decided to change it¡¦s military strategy in the new era from ¡§prepare to handle the local war in the normal conditions¡¨ to ¡§prepare to win the local war in the high technical conditions¡¨ in 1993. Then, China declared it¡¦s military strategy transformed from ¡§prepare to win the local war in the high technical conditions¡¨ to ¡§prepare to win the local war in the informational conditions¡¨ in China¡¦s National Defense White Paper 2004 and 2006. The paper focus on China¡¦s military strategy changing in the post cold war era that including four main parts: 1. An Analysis of the environment¡¦s changing of military strategy, such as international environment, types of war, military affairs changes, developments of economics, technology and informational; 2. An Analysis of the transformations of China¡¦s strategy culture and national security strategy; 3. An Analysis of the developments of military strategy source that including military institutions and organizations, national defense technology and weapon system, military education and training, military logistics and expense; 4. A forecast of the trend and limitations of China¡¦s military strategy in the future.