In this paper, we present a spoken dialog system for sports event guide, which could provide users with the information on such items as schedule, venue, team, as well as athlete according to users’ favor. It is one of the key applications in the ongoing project “Multi-lingual Intelligent Information Services Network System”, which will serve the Beijing 2008 Olympic Game. In addition to the descriptions of the system architecture and individual modules, we focus mainly on two important functions: natural language understanding (NLU) and dialog management (DM). The system was evaluated on 884 dialogues and achieved 85.9% transaction success.