This paper describes the necessity of metaphor database construction and discusses the nature of metaphor database and how to construct it. The metaphorical database is a large-scale database of metaphoric expressions. The metaphor database collects a wide variety of language expressions containing metaphorical thinking. The collected metaphor expresses the source area and the target area first, sets a keyword that covers the subject area and the source area covering the target area, and presents the examples and the sources of the metaphor expression in actual use. The metaphor database thus constructed is not only a base for understanding the expression of Korean metaphor, but also a production data that can express metaphors. At the educational level, it can be used both as comprehension and metaphor for Korean metaphor.