The purpose of this study is to investigate the current infrastructure of database on costume cultural heritage. The contents, kinds and accessibility regarding the digital contents of the websites of literature archives, museums and culturecontent.com by Korea Creative Content Agency were analyzed. First, it was evident that the quantity and quality of the database should be improved. The literature archives are mostly comprised of historical documents; however, the quantity of the database regarding the documents that are commonly studied in the field of traditional costume is not satisfactory. On the other hand, the quality of the database depends on the in-depth understanding of the terminology because errors occur when the contents of literature are transferred to an online database. Second, various information is required to meet the needs and interests of the digital environment. Most of the museums provide information on costume cultural heritage through their websites; nevertheless, it is not thorough and only partial. Third, the reliability of information needs to improve. The various contents provided by culturecontent.com lack reliability as it focuses on the entertainment values. To increase reliability, the source and origin of the information about the costume cultural heritage should be provided and the contents should be proofread before they are exposed to the public. Based on these findings, the researchers put forward the following suggestions: the quantity and quality of the databases should be enriched, and that more diverse information is required. Finally, more attention should be paid to increase the reliability of this information. This study will be an asset for the foundation to build solid databases and popularization of the traditional costumes.