RESUMO
Objective To study and analyze technology of proxy server,VPN and specific remote access system.Methods The application of digital medical library was studied in such four aspects as adaptability,security,accessibility and extensibility.Result Many approaches were put forward to break the limits of IP address and realize remote access to digital resources.Conclusion In order to meet the actual requirements in the remote access of digital medical library,the following rules should be observed: the technical scheme with obvious functional limitations should be avoided;importance should be laid on mutual sharing and remote access between chief library and branch library;the maximum concurrent access should be born;multiple certification methods should be utilized as well as multiple techniques such as information distributing.