In the 21st century, knowledge sharing and creation has become the primary productivity to promote organization development. During the period of group activities, excellent collaboration technique is necessary to ensure knowledge creation. In this paper, based on system methodology of Meta-synthesis, whose essential idea can be simplified as ＂confident hypothesizing, rigorous validating＂ proposed by Chinese system scientist Qian Xuesen （Tsien HsueShen）. We develop a computer-based tool： group argumentation environment （GAE）, which supports group activities, such as group argumentation, group knowledge creation, divergent and convergent thinking process. It can be viewed as a ‘ba＇ for collaboration and knowledge creation