Libraries can be seen as a treasure for keeping, saving and supporting knowledge. In this case, how to serve readers efficiently is a crucial work of libraries, which is one of the major functions of libraries, which is one of the major functions of libraries. Nowadays, with the changing of the educational system, the atmosphere of reading is emerging in Taiwan society. Although MDN (Mandarin Daily News) Children’s Library is a small library, we consider it our responsibility to help children establish their reading habits. This article focuses on the process the building an automation system. We build library automation system to improve our service quality, as well as working efficiency. We hope to make good use of information technology to promote the quality and number of the library materials. It is expected that this article may be helpful for new libraries or those that will build a library automation system in the future.