The trend of reference services today has been shifting toward a more interactive, collaborative reference model, in which both the reference librarian and the reference user play the roles of information seeker, information receiver, and even information creator. Researchers who study virtual reference issues think of reference services less in terms of question answering and more in terms of research, information selection and evaluation assistance. This article has done some research of literature from traditional reference services to digital reference services, and has collected experts' views about the latest trend in reference services, and has found out that today´s challenges will be to design and implement appropriate technologies that can support and enhance reference librarians' capability when facing the users' needs and preferences. And it's important to incorporate these technologies into reference librarians' education. Although RIS (Reference Information Services) are moving more and more toward digital environments, this study suggests that reference services as a whole are not in danger of being eliminated any time soon. While librarians might be called upon less for assistance in the mechanics of basic information searching, they are now needed more than ever for their expertise in teaching users about the nature of modern information, for sharing their knowledge of the wide range of available information resources, for collaborating with users during the various stages of the search and research process, and for evaluating information quality. Librarianship today has been facing a great deal of challenges, but we believe with the flexibility, creativity, and dedication inherent in our profession, we will be getting better and the reference services will be more & more complete.