It is a response to the needs of the development trend of the times for enterprise archives sectors to actualize knowledge services, a response to the needs of the competitive pressure of the market, and a respond to solve the puzzles of the current enterprise archives work. Knowledge management and the Post-Custodial Paradigm for Archives provide theoretical foundation for the knowledge services of enterprise archives. In order to actualize knowledge services, enterprise archives sectors should transcend traditional archives services in following aspects: service theories, service purposes, service subjects, service manners, service ways, service tactics; service processes, etc.