Library Assessment Conference of American Research Library Association (ARL), held every two years since 2006, is an important international conference on library evaluation in North America. This paper interprets the “Proceedings of the 2018 library assessment conference”, and analyzes the evaluation characteristics of American university library. At last it thinks that the university library in China should learn from the experience of the American university library evaluation theory and practice development, from the combination of incorporating evaluation into the daily management of library, strengthening evaluation theory and management practice. To play the role of trade associations and organizations in three aspects to promote the evaluation activities of university libraries in China.