Sungnymun gate dancheong was restored on the 2013. But this restored dancheong was occurred damage. So, this study on the materials used in order to determine the cause. Consequently, 10 kind of pigment are artificial pigment, except for the Seokganju and Hobun. Make a compare binder sample, this binder was different and ratio of binder. Comparison of the binder in Sungnymun sample and test sample. The result of confirmed that no change Sungnymun sample. compare sample coating procedure was different and used accelerated weathering. Overall, the coating layer is thicker, the higher the incidence of peeling, when used across a binder.