The traditional metaphorical view believes that a metaphor is a figure of speech without a metonymic word and its basic paradigm is A is B. Meanwhile, it is regarded as a pure linguistic phenomenon and simple rhetorical device, and the study on it is limited to the category of rhetorical device and literature. However, with the deeper development of metaphor studies in cognitive linguistics, metaphor is regarded not only as a linguistic phenomenon, but also as an important tool and thinking mode of human beings to know the world. On the basis of analyzing a considerable amount of metaphorical expressions about love in English and Chinese with a comparative way from the perspective of cognitive linguistics, this paper elaborates the philosophical foundation of their common and different traits showing the relative cognitive mechanism and reflecting the nature of cultural mapping.