Abstract:The expansion and innovation of the scientific field needs to build a bridge between the old and new thinking, and the scientific metaphor is a migration carrier for people to interpret the new target domain by borrowing the similarity of the origin domain, which can promote the creation and reasoning of the concept of the new discipline system, improve the communication within the scientific community and the efficiency of the public's understanding of science. This paper briefly expounds the origin and development of scientific metaphors. The functions of scientific creation and dissemination and the psychological mechanisms supporting these functions were sorted out. Finally, using artificial intelligence as a case study, the key role of foundational metaphors and sub-metaphors in this field in advancing public understanding of science is revealed. By analyzing scientific metaphor in depth, it can help the public truly understand the cognitive instrumental role of metaphor and the profound impact it has on public understanding of science, as well as to emphasize the necessity of metaphor.