This paper provides conceptual information of national security and discusses some related theories and operations for implementing network-centric warfare (NCW). We here focus on the related theories and operation for NCW from U.S. National Security Agency (NSA) and Department of Defense (DoD). NCW is an emerging theory of war in the information age and forms a central part of the Administration's plans for defense transformation. The network centric approach to warfare is the military embodiment of information age concept. We notice that NCW involves collaboration and sharing of information to ensure that all appropriate assets can be quickly brought to bear by commanders during combat operations. Some network-centric warfare observers believe that NCW can create a decisive warfighting advantages. Most importantly, as new concepts and technologies are proven valid over time, NCW may extend to become a stabilizing deterrence against future conflict.