This paper tries to interpret the processes of establishing the public libraries in Changwon City and its changing sociological roles. The roles of the public libraries are changing according to the aspects of the communities. Thus roles of the libraries in Changwon have also changed with the various changes in Korean society. The periods are divided into three: before the declaration June 29(1980-1987); the appearances of civil libraries and local community libraries(1988-1998); the maeul (which means small community) libraries that the citizens have established and participated. By the three periods this paper interprets the processes of establishing the libraries and their changing in Changwon City.