Tsinghua University Library recently launched Tsinghua Wireless and Mobile Digital Library System(TWIMS) to meet users’ need for wireless access to library services.A survey of user experience about TWIMS was carried out for the purpose of studying its users’ behavior and their level of satisfaction about the system design and its various performance indicators. Based on our research findings, we concluded our research paper with a set of evaluative comments and suggestions. Those remarks are aimed at furthering the TWIMS’ functionality and reconstructing a more sensible questionnaire survey appertaining to the system users’ experience as well in the next phase of our extended research. Tsinghua University Library recently launched Tsinghua Wireless and Mobile Digital Library System (TWIMS) to meet users ’need for wireless access to library services. A survey of user experience about TWIMS was carried out for the purpose of studying its users’ behavior and their level of Based on our research findings, we defined our research paper with a set of evaluative comments and suggestions. Those remarks are aimed at further evolution of the TWIMS ’functionality and reconstructing a more sensible questionnaire survey appertaining to the system users’ experience as well in the next phase of our extended research.