Abstract: This paper introduces briefly the Library Circulation Management System WD-TLX designed for microcomputer MC-68000.The system's main characteristic is the use of new data structure and data compression techniques.The storage capacity thus required is reduced to one third of those which are required by similar systems.Thus problem that microcomputer does not hold enough storage capacity has been solved.It becomes possible that microcomputer MC-68000 can be used in the automatic library circulation management of large-scale libraries such as the Library of Wuhan University.Another characteristic is that,without any chinese character equipment,various statistical tables can be printed out in chinese characters by designed program.Thus the system is more practicable.