Due to the rapid development of information and medical technology, medical libraries' role as a medical resource provider becomes increasingly important and volatile. However, the purchasing fund of medical libraries fails to catch up with the cost of medical resources. Forming a consortium to facilitate cooperation and share resources is an alternative choice for medical libraries. This study focuses on the establishment and development of the Digital Library Alliance of National Military Hospitals, which consists of ten national military hospital libraries in Taiwan. Through literature review and secondary internal data analysis, this study aims to explore the medical libraries consortium home and abroad and the establishment background, characteristics, and future development of Digital Library Alliance of National Military Hospitals.