Abstract: This paper sorts out, analyzes and reviews the current research paper of library big data. The result shows that the study of library big data is still at nascent and ambitious stages, the theoretical, practical, and comparative study need to be strengthened, the further research should focus on the wideness of horizontal study and the depth of vertical study to improve the application and service of library big data.

Key words: library; big data; countermeasure; opportunity; challenge