This paper dicusses the working principle of producing background and information of Z39 50 and WWW,based on the comparison of these two types,states that the difference between HTTP,TCP/IP two common use agreements in Z39 50 and WWW.

• 本文讨论了 Z39.；5 0和 WWW的产生背景及信息的工作原理；在对比这二者的基础上；叙述了Z39