This article puts forward importance of earlier strategy and preparation on the establishment of library automation system which includes the setting of a goal and the selecting of a good software as well as the making a general program on developing library automation system,and emphasis on the setting up of the bibliographic database,the choosing of the right system management personnel.On the bas is of the investigation the author gives several judgements on choosing automatic software and emphasizes that resource sharing is the main goal of the library automation system.