This thesis intended to examine the ‘Korean cultural heritage value’ targeting Korean diplomatic missions overseas as the concept of ‘Korean cultural heritage’ in the 「Cultural Heritage Protection Act」, revised in March 2017, is expanded. During the Joseon Dynasty and the Korean Empire, resident legations were opened and operated in the capitals of major countries such as Japan and the United States. In 1949, through the revision of Presidential Decree No. 60 “Diplomats and Consulates”, the term “Korean Diplomatic Missions Overseas” began to be used. Korean diplomatic missions overseas can be classified into diplomatic, architectural, and landmark values according to the ‘Korean cultural heritage value’. Accordingly, the author introduced the ‘Korean cultural heritage value’ of Korean diplomatic missions overseas that fit the concept of Korean cultural heritage overseas in the 「Cultural Heritage Protection Act」 and conducted research for the purpose of utilizing and promoting Korean cultural heritage by discovering valuable Korean diplomatic missions overseas in the future.