In daily life, people spend a lot of time in group activities, such as communication, debate, collaboration and consensus achieving for problem solving where creative ideas are expected to be generated by active interaction and stimulation between participants. In this paper, we focus on exploring effective computerized support for group argumentation, mainly on group brainstorming for idea generation. Versatile aids are explored, such as visualization of expert opinion structure, text-mining of external information, clustering of contributed opinions and various analysis about participation, etc. and integrated into a group argumentation environment (GAE), to support the emergence of a ba for knowledge creation. We apply such an enviornment to top-level small-scale academic conferences (Xiangshan Science Conference) on frontiers of science and technology in China.