CVM (Contingent Valuation Method) has been most widely used for valuation of public libraries. However, there have been a debate on the validity of CVM in that many kind of biases could exist due to its hypothetical nature, the type of questions, payment vehicles and so on. To ensure the validity and reliability of public library valuation, this study analyzed the effects of payment vehicles to valuation using CVM. Three types of payment vehicle, tax, donation, fee were used to pay in hypothetical market. As a result, these payment vehicles estimated the different WTP and donation produced 14,542 won, which is the highest WTP.