In this paper, we propose an interactive web-based multi-user document editing system in which users can cooperatively create and edit documents. Although the document description/edit system using a computer exists variously, those many are not reflecting human's cognitive mechanism. The design concept of our system is to reflect the cognitive mechanism of "We write sentences with the computer". Moreover, in this system, users can not only create and store valuable information, but are also able to collaborate in real-time with other users using our system. Additionally, information stored by past users can be reused in new documents if found relevant. This is known as indirect knowledge communication and collaboration.