Abstract: With the rapid development of big data technology, great changes have taken place in library's knowledge discovery service mode, and embedded knowledge service mode has been rapidly applied and promoted. This paper introduced the embedded knowledge service of library under the background of big data in detail, and analyzed the relationship between information analysis service and data analysis, and focused on the process of embedded knowledge discovery and intelligence analysis service, and constructed the relevant service model, to lay the foundation for improving the service level of library.