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Multi-agent technologies are essential in realizing the upcoming ubiquitous environment. In the multi-agent environment, each agent has its own set of services and stores these services in the service repository of the multi-agent system. By using this repository, the user can retrieve the most appropriate service. The goal of this paper is to propose a way to register agents so that makes users or autonomous agents to find target agents more conveniently and efficiently. Also, this paper is to propose a way to federate DF registries. In order to achieve this goal, we have survey the key technologies such as agent platform, FIPA DF, JADE, repository systems. In this paper, we propose an efficient service repository architecture that can improve the exiting agent-based service discovery. An advantage of the proposed architecture is that the user can obtain more suitable services than existing approaches about service discovery.