國軍保防安全工作包括「保密」與「防諜」2大項，5大工作，前者即確保機密安全，透過保防教育、保密檢查及各種保密措施，以提高官兵保密警覺，確保軍事機密安全無虞。後者即是肅清潛伏敵人，藉由安全調查、人員清查、安全部署、偵防、安全偵測等作為，防制敵人滲透破壞，保障軍事安全。因此，國軍保防安全工作係以保密工作、保防教育、情蒐工作、安全調查及安全維護等5大工作為區分。 國軍是國家安全的重要守護者，沒有安全就沒有一切，惟有鞏固與安全的國防力量，才能無懼於敵人的武力威脅。歷來，國軍保防安全機制對維護國防安全多所貢獻，惟時代環境變遷，社會價值觀更迭，對保防安全工作多有衝擊。因此，如何針對國家安全情勢、敵人陰謀策略，結合現實環境與國軍任務需求，深入探討，以精進國軍保防安全工作強度與深度，提昇國軍戰力，維護部隊整體安全，並期盼全軍保防同仁綜據本文各項工作作法，確實擺脫業務表報路線及虛應交差心態，運用組織、走入群眾，結合相關情蒐管道，營內營外明密配合，發揮機智、不拘泥作法，不墨守成規，因勢利導，使保防安全工作從「有什麼，要什麼」，真正做到「要什麼，有什麼」之最高目標，以確保國軍整體安全。 關鍵詞：國軍、保防工作、保防安全制度、國家安全 / Military security works are “security” and “check”, there are 5 categories. Security makes sure the safety of information, by the means of education, check-up and various procedures to upgrade the awareness of staff to secure the information. Check means to screen the underlying enemy, through security clearance, personnel clearance, safety application, detection and safety detection, block the destruction from the enemy, secure the military safety. Military security jobs are as following: security works, security education, information collection, safety clearance and safety maintenance. Military is the guardian of national security, the country is fragile without security, with solid and sound national force only; the country is fearless by the threat of enemy. In our history, military security system has paid great contribution to the national security, in the changing world; the social values are changing, which are impacts to security works. So, focus on the national security situation, the plot of enemy, combined the reality and military mission, with great efforts, to strengthen the military security criteria, upgrade the military warfare, maintain the whole safety of troops, the staff of military security division will follow the procedures accordingly, use our organization, work with people, make use of the information collection, mesh all forces, with our wits, flexible methods, to reach the highest goal, which is from “want what you get”to “get what you want”, guarantee the safety of our military wholly. Key words: military, security, security system, national security