Many university libraries have installed integrated library automation systems since 1980. As library automation has brought a lot of changes traditional library organizations and procedures don't meet the needs of libraries. Many university libraries undertake reorganization of technical services. This paper mainly discusses the reorganization of technical services in university libraries. First fundamental theories on library organization are reviewed. Second six important issues which modern university libraries face are explored. Third ten examples of reorganization of technical services in American university libraries are given detailed description. Fourth the present organizations and problems of technical services in Taiwan university libraries are reported. Finally the paper arrives at conclusions and makes suggestions.