三元世界理论已逐渐得到计算机科学、情报学、哲学、城市规划学等领域学者的广泛关注和探讨，但对其概念内涵、逻辑关系以及划分依据等方面仍不够明晰且存在较大认知差异。文章在梳理三元世界相关研究成果的基础上，对C-P-S三元世界理论的内涵及内部逻辑构成进行解读，探讨其与数字孪生、元世界的内在关联。同时，着重探究三元世界理论在国家安全情报研究中的理论与实践应用，分析三元世界与国家安全情报的内在关系，挖掘三元世界视角下国家安全情报工作中的新场景、新手段，提出国家安全情报空间，有助于对三元世界理论与应用的再认知与再思考，对开展国家安全情报工作具有一定的理论指导价值。

The ternary world theory has been widely concerned by scholars from multiple fields such as computer science, information science, philosophy, and urban planning. However, its conceptual connotation, logical relationship, and division basis are still not clear enough. Based on the systematical analysis of related research results, this study endeavors to reinterpret the connotation, internal logical composition of the ternary world theory, and its relations with the Digital Twins and Metaverse, and form a new understanding of the Cyber-Physical-Social ternary world. Meanwhile, we focus on the practical application of the Cyber-Physical-Social ternary world theory in national security intelligence. By analyzing their internal relationship, we explore new scenarios and new methods in national security intelligence work from the perspective of Cyber-Physical-Social ternary world. This research is beneficial for recognizing the theory and application of Cyber-Physical-Social ternary world and has certain theoretical guiding value to the national security intelligence work.