The rapid growth of the volume of unstructured data brings great challenges to data storage, data security, data management and data utilization. The effective management of unstructured data has become a strategic need in the process of digital transformation of each organization. To meet with the urgent management need for massive document data scattered application systems and personal devices in the process of research, engineering construction and management, we developed and deployed a document management system (IHEP Docs) in institute of high energy physics of the Chinese Academy of Sciences (IHEP, CAS). This paper introduces its construction background, technical architecture, functional characteristics and the situation of application and operation in IHEP. At last, the future deployment plans for IHEP Docs are proposed to meet with the new and further requirements of document management and documents collaboration in IHEP.