This paper studies the option pricing of information services for library, based on the sample data and established information services priority option pricing model, real option pricing model, complete binary tree model and the complete black-scholes model .The results showed that: when the basic download service charges three yuan and with one year service period, the four option pricing models all show that consumers only need to pay an additional fee about 0.2-0.3 yuan, then Priority options can be purchased to enjoy the download service directly, which also verifies the effectiveness of information services priority option pricing model.