Image is an important aesthetic category in Lyric literature, especially in the rhyme literature dominated by poetry. It is a unity of subjective “emotion” and “external objects”. In poetry, the ordinary language referring the external objects will become the image language, which no longer has the basic conceptual meaning of the simple daily language, but has the metaphorical and deep creative meaning. Conceptual Blending Theory is a theory to explore information integration and dynamic meaning construction. It takes psychological space as the basic unit and provides a new perspective of analysis on the construction and understanding of emergent meaning of the image language from the cognitive view. It is through a series of cognitive activities such as analogy, conceptual package and knowledge model that a poet integrates the frame information from two different space domains of “emotion” and “scenery”, “heart” and “object” through three interrelated stages of “composition”, “completion”, “elaboration”, so as to complete the cognitive construction of emergent meaning of the image language. Conceptual Blending Theory has a strong explanatory power not only for the construction and understanding of the daily discourse, but also for the construction and understanding of the image language of poetry.