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The aim of this study is to compare scaled model, CG and slide experiments that are frequently used to evaluate the color environment with mock-up experiment, and to verify their validity. The result of scaled model, CG and slide experiments was respectively compared with that of mock-up experiment and the significant difference was verified by the Analysis of Variance.The result of this study was as follows. 1) The result of analyzing the significant difference between each experiment and mock-up experiment was as follows; In the case of scaled model experiment, there was no significant difference in most evaluation adjectives. In the case of CG experiment, the evaluation of spaces in which there was furniture to show the spatial function was mostly valid. But the evaluation of spaces in which there was no furniture was partly valid. In the case of slide experiment, there was significant difference generally in adjectives of evaluation factor and working factor and the P-value of the space in which there was no furniture was generally lower than that of other spaces.2) The result of mutually comparing the validity of each space was as follows; The extent of validity was formed of gradation from high to low in order of scaled model, CG and slide. This result was similar in any space.