Abstract
"Socion"is our term for a transmitting unit("person")of social network named after neuron.Each socion outputs internal stste ("attiude")through information channels weighted selectively by the other coupled socions.The internal state of a given socion is determined by the integration of weighted inputs from the other socions, which we call "selective heteronomy" "Socios", a network of socions' tends to evolve some emergent social order througeh the system dynamics of channel-weights adjusting process, mediated by the learning behavior of individual socions.Our aim is to describe and explain this self-organizing dynamics of social network system, through computor simulation, as well as thought experiment. Socion theory might provide a new theoretical paradigm for communication study, group dynamics and sociology in general.