Abstract: National defense science and technology has become the main battlefield of great power competition. The assessment of national defense science and technology is of great importance for the major strategic needs of national security oriented defense technological innovation. This article adopts the methods of literature research and content analysis to analyze the current situation of U.S. defense science and technology assessment from the perspectives of legislation, administration, and civil society organizations, and provides reference for the improvement of national defense science and technology assessment. The study has found that the U.S. defense technology assessment system is relatively complete, which has played an important role in its defense science and technology management and innovation. In addition, the U.S. defense technology assessment is becoming more and more important, and the mathematical model is gradually included in the evaluation method system, and the diversified specialization combination is becoming the mainstream of the evaluation agency. The independence of its evaluation position, the innovation of the theoretical method of evaluation and the institutional management of the evaluation work are worth learning from.

Key words: Defense Science and Technology Evaluation; Technology Assessment; Development Status; Development Trend; U.S.