ased on the Patron Driven Acquisition （PDA） model, this paper briefly introduces the library in domestic and foreign paper books to borrow to buy model, and taking the promotion of " Yun Tai Gou " online platform of Jilin Institute of Chemical Technology as the research object, statistics and analysis the advantages and disadvantages of the online borrowing and purchasing service platform in colleges, and the future of the online borrowing and purchasing service of printed books in the library was discussed.