Such future-oriented institutions that put together the functions of a library, archive, and museum are being actively introduced overseas recently and are called LAM, GLAM, and media tech. In South Korea, the term larchiveum, combining library, archive, and museum, is widely used. Therefore, this study explores a case study followed to determine larchiveums in service both home and abroad. The researcher then conducted an interview with librarians, archivists, and curators working for the larchiveums selected as the South Korean cases for the study to understand the meaning of a larchiveum. Additional interviews were conducted with five users that visited a larchiveum in the nation and uploaded posts on a social media platform to understand their perceptions of a larchiveum and problems with the purpose, functions, and services of it. Based on the analysis results, the study proposes vitalization plans for the management of a larchiveum in three aspects: improving the internal and external awareness, securing budgets and manpower for space enhancement and service, and reinforcing the integrated management of a larchiveum via a devoted organization.