Taking ILAS 5.0 developed by Shenzhen Library for example,this paper analyzes and solves several common problems related to the design and accomplishment of LAS(Library Automated System).First,the menu interface of the multiuser LAS should be dynamic, Changeable in order to make each user at all levels see only the menuitem relating to his(her) sely.Second,“automatically producing” of bibliongraphic data should help lighten user's labour ,by adhering to the hanoly and scientiqic principles.Third,this author also analyzes and solves some prohlems in MARC form,emerging when ILAS processes the western-language literature,Next,ill funcfion provided by LAS must accond with the habit of most users.Funthermore,the modibying of CNMARC is essential,but relevant changes in the proaram of LAS have to be made accordingly .Last,LAS should provide a simple and feasible method of bibliogvaphic data exchange betineen the system and the external world.