本文基于认知语言学与功能语言学的融合视角，将“喻”确立为统摄隐喻、转喻与语法隐喻的上位理论范畴，并构建喻的认知—功能经验意义框架，系统探讨其本质、起源与功能三大核心问题。研究将喻界定为“概念—修辞复合体”，并基于相似性、邻近性与重构性三维参数建立统一的喻范畴体系。研究表明，喻源于人与世界的体认互动，经由经验概念化与经验社会化双向路径形成动态的喻资源系统。该资源系统在概念建构、人际协商与语篇组织中发挥着核心元功能。

From an integrated cognitive-functional perspective, this study establishes yu as a superordinate theoretical category encompassing metaphor, metonymy, and grammatical metaphor. It constructs a cognitive-functional framework of experiential meaning to systematically explore three core issues: the nature, origin, and function of yu. The study defines yu as a “conceptual-rhetorical complex” and establishes a unified categorical system based on the three-dimensional parameters of similarity, contiguity, and reconstrual. The study demonstrates that yu originates from the embodied interaction between humans and the world, and develops into a dynamic resource system through the bidirectional processes of experiential conceptualization and experiential socialization. This resource system plays a central metafunctional role in conceptual construction, interpersonal negotiation, and textual organization.