Directory has become more and more important part of Internet technology. Directory exists in a multitude of application ranging from operating systems, asset management systems, security systems, etc. Even more Gartner Group's, a market research firm, predicts that there will 40% to 90% portion of new software and hardware are directory related products at end of 2001 to 2003. In directory industry field, we can divide products into 3 fields: Directory server, Management system, directory application. Management system is one of important part of directory services. Now directory management system is focus on non web-based system. While directory service applied on Internet services, it is necessary to provide web-based management interface. Web-based management interface will provide advantages of ubiquity, cross platform, thin client, reduce TCO (total cost of ownership). In this thesis, we design a web-based directory management architecture to provide directory management functions, manage multiple directory servers, and operate with secure features. We implement system using most popular components such as apache web server, PHP script language, SSL protocol so that it can be easy to port to other systems and easy to rebuild.