Abstract : The development of science and technology has entered the era of “Intelligence explosion”. The interaction and integration between artificial intelligence and other technologies are triggering a new revolution in science and technology. While the individual intelligence grows rapidly, artificial intelligence is moving to group intelligence. Group intelligence aggregates “many low-level agents” to form “high-level agent”, which has become the worldwide forefront and hot direction in the field of artificial intelligence research. This report analyzes the theories of group perception, group cognition, group decision-making, group dynamics and the corresponding optimization algorithms. It also studies the scientific issues and key technologies of group intelligence and proposes a micROS that can support group intelligence and its architecture design.