This paper first reveals that, during the twelfth century alone, pottery makers of the Goryeo dynasty copied patterns that had appeared on Song ceramics across three periods ranging from the late tenth century to the early twelfth century. Following these findings, the author of this paper indicates the similarity between the illustrations recorded in Yingzao Fashi (Building Standards), a treatise on architectural methods written in the Northern Song period, and the patterns and designs of Goryeo celadon. In so doing, the author preliminarily compiles and examines the official models of the Song dynasty that are observed on Goryeo celadon. Except for a small number of patterns, such as the two-horned five-clawed dragon that symbolizes the Chinese emperor, Song official models often became fashionable patterns among the popular class. These models were derived from a variety of sources, inheriting the decorative elements of the Tang dynasty while referring to the models of foreign artworks and handicrafts. Original designs by the Song people were, of course, among them.