This paper provides a mechanism to deal with static/dynamic properties in a web-based Multi-Modal Interaction (MMI) system. The static/dynamic properties in this paper include user profile, user's facial expression, surrounding environment, and so on. By using these properties, the MMI system can make interaction more natural based on context or situation. To consolidate these properties into a module, we have designed and developed a static/dynamic property manager on our MMI system. We have also prototyped a user navigation system that introduced user profile, user's facial expression and GPS information as static/dynamic properties.