In this paper, we propose an architecture of name service system which can provide mobile nodes in IPv6 mobile ad-hoc network with the name-to-address resolution and service discovery. Because mobile ad-hoc network has dynamic topology, the current DNS is not appropriate to name service in mobile ad-hoc network. We suggest the design and implementation of name service system suitable for the mobile adhoc network, autoconfiguration technology related to name service, and service discovery based on the name service system.