The current library online book procurement has the technical risk, operating risk, management risk, market risk, credit risk, transaction risk and compliance risk. Although the incurring of these risks is due to the technical defects in the network system, the weakening of supervision, the complication of relationships among people in charge of library online book procurement, and the serious lag in legislation, it' s necessary to build and perfect the market admittance system of the online booksellers and the supervision system of the librar...