A coating-color-evaluation-image generation method from a coating-surface image displaying a coating surface, comprising: a spectral reflectance calculating step (S1) 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 (S2) of calculating a colorimetric value at each predetermined angle in the observation angle range according to the spectral reflectance; a histogram generating step (S3) of measuring a number of pixels at each gray level of the coating-surface image 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 (S4) of associating an observation angle (A) at each predetermined angle in the observation angle range with each gray level of the coating-surface image ; and a coating-color-evaluation image generating step (S5) of generating the colored coating-color-evaluation image 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 (A) and by a quantity corresponding to the ratio of the number of pixels for each gray level associated with the observation angle (A) 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 (S1) 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 (S2) of calculating a colorimetric value at each predetermined angle in the observation angle range according to the spectral reflectance; a histogram generating step (S3) of measuring a number of pixels at each gray level of the coating-surface image 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 (S4) of associating an observation angle (A) at each predetermined angle in the observation angle range with each gray level of the coating-surface image ; and a coating-color-evaluation image generating step (S5) of generating the colored coating-color-evaluation image 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 (A) and by a quantity corresponding to the ratio of the number of pixels for each gray level associated with the observation angle (A) 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. <EOS>