Abstract: With the development of military networks countermeasure technology, network security early warning man- agement has become an essential part of constructing military networks defense in depth system. This paper focused on military networks countermeasure real environment, use of security early warning mechanism in the military network defense-in-depth strategy, proposed the design ideas, reaching goals and function structures of military network security curly warning system which is built into a real time situation awareness, technical and management coordination, pcace- time and wartime seamless connection. Finally, the current implementation principle and technology of early warning system were summarized.

Key words: Military network, Network countermeasure, Defense-in-depth, Security early warning, Early warning sys toms