Abstract: This paper conducts a cognitive study of a multimodal discourse in order to provide a new focus on dynamic process of integrative meaning construction of the metaphorical multimodal discourse.Based on the generalization of features of multimodal metaphor, this paper proposes that the integrative meaning of metaphorical multimodal discourse derives from a complex conceptual blending involved with interplay of metonymy and metaphor.It reveals that the cognitive approach helps to explain the psychological motivations for the persuasive and aesthetic function.