This paper starts with the question, "Why is Korea's national security strategy inconsistent?" Therefore, I decided to use the lessons from the review of national security strategies published by the US administration as the basis of analysis to judge and evaluate them. When comparing the case of Korea with the United States, Korea had two important problems. First, there was ambiguity in the basis, scope and composition of the national security strategy, and second, it was difficult to observe the historical consistency of national security strategy planning. This was a general problem of past governments, not limited to governments at any given time. If so, what alternatives are needed to improve these problems and to systematize Korea's national security strategy? The researcher proposes three alternatives as follows. First, the establishment and prioritization of Korean national interests based on the Korean Constitution must be preceded. Second, we must expand the margins of the national security objectives that have been entrenched in security (defense, diplomacy, and unification). Third, specific integrated national security strategy tasks for achieving national security goals should be derived. Through these improvements, Korea's national security strategy planning will be more systematic.