This paper attempts to discuss the establishment of library book drop in Hong Kong university and related statistics of its usage. An analysis of the application of RFID technology in library is also included in discussion. The topical explorations of library book drop and RFID technology are primarily intended to reveal a current change in the library user service from the semi-automated to the fully-automated mode. Factors that influence the application of RFID in library are involved in this study. The prospect of practically putting RFID technology in use is also further examined.