本文以评价理论的“态度”子系统为理论框架,以奥巴马2010年国情咨文为研究语料,分析概念隐喻的劝谏功能,从积极和消极两方面分析概念隐喻的评价意义。隐喻所传达的评价意义能够帮助实现劝说民众支持或反对某项政策、采取某种行动的政治目的。 This dissertation takes the “attitude” subsystem of evaluation theory as the theoretical framework, takes Obama ’s 2010 State of the Union address as the corpus and analyzes the advocation function of conceptual metaphors, and analyzes the evaluation significance of conceptual metaphors from both positive and negative aspects. Metaphors convey the meaning of the evaluation can help to achieve the political purpose of persuading people to support or oppose a policy, take some action.