ebXML is a global electronic business standard that is sponsored by UN/CEFACT and OASIS. ebXML is an open XML-based infrastructure enabling the global use of electronic business information in an interoperable, secure and consistent manner by all parties. ebXML Registry provides a stable store where the business information submitted by partners is made persistent and a set of registry services that enable clients of the Registry to access them. These services are tied to the structures defined in ebXML Registry Information Model(ebRIM), so we need a way to process them according to underlying database systems. In this paper, we present the result of developing the ebXML Registry Server based on Relational Database Systems.