[Purpose/significance] Nowadays, the development of domestic E-book market oriented to library is growing rapidly. According to the practice of Beijing Normal University Library in purchasing E-book published in Hong Kong and Taiwan, the paper designed the Chinese E-book purchasing program based on the single book purchase mode, and explored E-book purchase mode of purchasing on demand (PDA) and coordinated purchase mode of printed & E-books.[Method/process] This paper constructed the purchasing program from several aspects, which included resource analysis of E-book platform, trial opening and demand analysis of E-book purchasing, purchasing mode and procedure, contract signing and E-book management, so as to shed light on the practice of E-book purchasing in academic library when they decided to buy E-book on type.[Result/conclusion] The implementation of single E-book purchase requires library to make new arrangement on purchasing policy and mode. Academic libraries should pay close attention to the development of E-book platform both domestic and abroad, and launch Chinese E-book purchasing program and put it into practice as soon as possible. The mode of Chinese E-book purchasing has been turned out to be feasible.