In the era of big data, the volume of enterprise archive data presents a trend of ocean quantization. It is difficult to cope with increasing data demand by traditional archive services. For this particular issue, this paper explores the problem to be solved in enterprise archive data service at the present stage, and proposes“two libraries and two platforms”to realize intelligent use of archives. The concept of semantic ontology is introduced into the use of enterprise archive data to support the process of semantic analysis of archival data. Based on this, a Knowledge Graph system of electronic archives of China Unicom is constructed to visually demonstrate the association between archival data and analysis results, and demonstrates the value of enterprise electronic archives effectively, and provides strong support for the intelligent management of electronic archives and the auxiliary decision-making.