With the fast development of internet, the multicasting applications (such as Distant Learning) have become more and more important. Since multicasting multimedia information over the wired links might generate heavy traffic streams to cause congestion, the utilization of internet will be reduced dramatically. The satellite with broadcasting capability and high bandwidth could provide an alternate transmission way. Most of applications using satellite are unidirectional. However, the bi-directional interactive applications will be needed to provide instant interaction. However the transmission latency through satellite is considerably long and might lead to the loss of interactive ability. Therefore, we propose an intelligent routing strategy to overcome the high latency and enhance the interactive capability over satellite links. Especially, this routing method is compatible with Mbone. We compare this routing method with one-to—one and one-to-many transmission and analyze the result. The results show transmission efficiency has improved.