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WWW becomes the most popular application platform due to its user friendly multimedia user interface. In this work, we design and implement a Web-based Real-time Interactive Collaboration Environment (WRICE) on the Internet. The goal of the work is to design an efficient and friendly network environment to ease the collaboration activities through the Internet. There are three important features implemented in our system, the first one is a user friendly interaction interface through synchronized free drawing and real-time video/audio stream, the second one is a scalable architecture that improves the multicast performance for multimedia content, and the third one is a web-based architecture with a variety of optional features, which are installation free from the standpoint of users.