Abstract: This paper describes the background of library outsourcing of acquisition and cataloging, analyzes the potential outsourcing risk affected the quality of the collection, learning ability of librarians and asymmetric information risks, brings forward the corresponding measure to control the risk, that is to reasonably determine the scope of outsourcing, implement the public tender for reasonable choosing booksellers, establish an effective communication mechanism, supervise the quality of outsourcing, carry out personnel reassignment and training.

Key words: library; acquisition and cataloging; service outsourcing; risk control