There are several studies for developing web-based CAE applications to substitute existing CAE applications. CASOW is the web-based CAE system developed by the author. The approach for implementation of the system is to use fundamental technologies, for instance, HTML, HTTP, CSS and so on, because we cannot know whether new technologies will be alive or not. Certain technologies bring specific advantages to the applications, but a life time of the application would be short. Recently a great advantage of web interface is developed. Such a representative application is Google Maps which doesn’t require any special software components; however the application realizes interactiveness of the application. The technology is called Ajax which drastically overcomes the bad interactiveness on the web browser. On the other hand, high efficiency of analysis work with high performance computers produces many kinds of knowledge and a large amount of information. We are confronted with inefficient knowledge and information management in the network system. This paper presents the new web-based CAE system using Ajax and knowledge sharing framework with compatibility to web interface. The system is presented, and advantages of the interface, effectiveness of the API in the system and knowledge sharing framework are discussed.