【Purpose/significance】With the bringing forward of the concept of "Internet + " and being a national strategy,the reform of library management and service become the trend of The Times.【Method/process】Facing with the new opportunities and challenges, the article first introduces the current situation of the development of library under "Internet + ",and then adopts "Internet +" thinking to innovate library service model on the basis of the deep understanding of six charac-teristics of "Internet +", and integrates knowledge collaboration idea into library management and service.【Result/conclusion】Finally the article proposes the library knowledge collaboration service mode.