Abstract: In order to provide the right person with the right business information at the right time, an extensible mechanism of active business information service is given. The mechanism can capture the changing data that are transformed into the message queue in realtime by means of multiagent technology. And then the messages in the queue are converted into the fact by the rule engine. They are matched with the eventconditionaction（ECA） rules compiled by the business aralysts. When the ECA rule is triggered. The action within it is executed. The business information can be created in realtime and pushed to the aralysts actively in this mechanism, so it can support the routine decision automatically.