A coating-color-evaluation-image generation method from a coating-surface image (60A, 60B) displaying a coating surface, comprising: a spectral reflectance calculating step of calculating a spectral reflectance of a metallic coating color at each predetermined angle in an observation angle range from the spectral reflectance of the metallic coating color which is measured at a plurality of light receiving angles; a colorimetric value calculating step of calculating a colorimetric value at each predetermined angle in the observation angle range according to the spectral reflectance; a histogram generating step of measuring a number of pixels at each gray level of the coating-surface image (60A, 60B) and calculating a ratio of the number of pixels at each gray level with respect to a total number of correction pixels obtained by removing the number of pixels corresponding to the maximum and minimum gray levels from the total number of measurement pixels; a mapping step of associating an observation angle at each predetermined angle in the observation angle range with each gray level of the coating-surface image (60A, 60B); and a coating-color-evaluation image generating step of generating the colored coating-color-evaluation image (70A, 70B, 70C, 70D) by arranging the colorimetric values calculated at each predetermined angle in the observation angle range in a sequence according to an order of magnitude of the observation angles and by a quantity corresponding to the ratio of the number of pixels for each gray level associated with the observation angle with respect to a total number of correction pixels obtained by removing the number of pixels corresponding to the maximum and minimum gray levels from the total number of measurement pixels. a spectral reflectance calculating step of calculating a spectral reflectance of a metallic coating color at each predetermined angle in an observation angle range from the spectral reflectance of the metallic coating color which is measured at a plurality of light receiving angles; a colorimetric value calculating step of calculating a colorimetric value at each predetermined angle in the observation angle range according to the spectral reflectance; a histogram generating step of measuring a number of pixels at each gray level of the coating-surface image (60A, 60B) and calculating a ratio of the number of pixels at each gray level with respect to a total number of correction pixels obtained by removing the number of pixels corresponding to the maximum and minimum gray levels from the total number of measurement pixels; a mapping step of associating an observation angle at each predetermined angle in the observation angle range with each gray level of the coating-surface image (60A, 60B); and a coating-color-evaluation image generating step of generating the colored coating-color-evaluation image (70A, 70B, 70C, 70D) by arranging the colorimetric values calculated at each predetermined angle in the observation angle range in a sequence according to an order of magnitude of the observation angles and by a quantity corresponding to the ratio of the number of pixels for each gray level associated with the observation angle with respect to a total number of correction pixels obtained by removing the number of pixels corresponding to the maximum and minimum gray levels from the total number of measurement pixels.