This study examines the origin and development of the Jinhyeongwan, a Gwanmo worn with Jobok, highlighting its evolution in the Chinese context and analyzing its characteristics in cultural heritage from the Goryeo Dynasty. This study aims to clarify the nature of the Gwanmo depicted in Goryeo stone human figures, wall paintings, and Buddhist paintings. The Chipogwan, tracing its roots to the Baekpogwan and Byeon, gave rise to the Jinhyeongwan. The Jinhyeongwan evolved in form and regulation from the Han Dynasty, becoming an official Gwanmo by the Song Dynasty. The Ming Dynasty reorganized its designation and institutional framework as Yangwan. Meanwhile, neighboring states such as Liao, Jin, and Yuan adopted the Jinhyeongwan as a Gwanmo worn with Jobok under Song influence, suggesting a similar impact on Goryeo. Goryeo Dynasty figures often show individuals in red Jobok with Bangsim-Gokryeong, holding ritual tablets. The Gwanmo worn by these figures closely resembles the Jinhyeongwan from the Tang and Song Dynasties in overall structure and composition. This study enhances textual records with visual materials, addressing the limitations of written sources and closely analyzing the interpretation of Gwanmo in Goryeo cultural heritage as Jinhyeongwan or Yangwan. Additionally, it provides a foundation for a more comprehensive understanding of the Gwanmo system reflected in Goryeo cultural heritage.