_{從新的角度對構建國家預警系統所基于的理論依據進行了分析，提出了國家安全因素層次以及相互作用的數學模型；簡要概述了預警系統功能與特征；重點介紹了該系統構建的方案以及系統運行的任務和時序，使該系統能適應新的國家安全形勢以及國家安全環境，有效維護國家安全。
關 鍵 詞 國家安全; 預警系統; 構建; 體系}

_{National security is a foundation which a nation has been existing and developing. Building a national security pre-warning system which bases on new international situations and national security traits is a important measure by which many nations will safeguard national sovereighty and interests. The theory gist the system based on will be analysed from new point of view.The paper will put forward national security factor’s levels and their interactional mathematics model; and will summarize briefly the system’s function and characteristic ; and will show emphases on the building plan and task and list of the system.}