This paper attempts to portray the issues of intellectual freedom that confront librarians in developing collections in libraries. It is observed that the issue has hardly been drawn attention in Korea while, from various cases, concerns about intellectual freedom have been increased in many countries. Situated in this observation, this paper surveys various aspects of endeavors to protect intellectual freedom in information service settings. It is also stressed how such issues as free access to information, freedom to know, information barriers in public sectors, and freedom of expression are addressed in library world. Emphasis was also put on the meaning of intellectual freedom as viewed through some policy documents and guidelines in other countries and its implications.