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Based on the theory of conceptual metaphor, this paper discusses the formation and characteristics of conceptual metaphor in the computer field and its influence on human thinking. The functions of the human brain and the expressions and related concepts used to describe these functions are applied to the computer, thus conceptual metaphor concerning the computer come into being. Conceptual metaphor in the field of computer, which is not only of universality but also of systematization, reflects human’s cognition of the computer and also influences human’s thinking mode to cognize the world. The study of this kind of conceptual metaphor can deepen our understanding of computer science and widen the research field of metaphor cognitive function as well. [ABSTRACT FROM AUTHOR]