This article has a brief introduction of the OAI protocol and principle of harvesting and makes a research on value-added services to extend the impact of digital library on the tide of information.

• 本文对OAI协议及收割原理进行了简单的介绍，对增值服务进行了一些探讨，以充分发挥数字化图书馆在信息化中的重要作用。