Abstract: Traditional data statistics can find the relevance between user data and document data. It provides the basis for resource procurement through data analysis.In the big data environment, user data is easier to collect. Through deep excavation, it can help the resources construction of university library. This paper envisages the resource analysis and interview system of university library based on big data. Through this system, we can achieve timely collection of user information and effective monitoring of users' needs.In the era of big data, data decision mode will replace traditional experience summary mode and subject librarian decision mode.It will become the mainstream mode of resources construction in university libraries.