ABSTRACT The change of behavior in an organization becaused organization structure, new information system technology usage and environment outside organization. The usage of new information system technology or replacement usage of new information system technology will also change individual behavior in organization. The change of individual behavior on information system technology related with individual performance becaused some factors, i.e individual attitude, subyektif norms, intention, behavior control, acceptance to information system technology, technology – performance chain, trust to technology, psikological attachment and qualitatif characteristic of information system technology. The existence some factors appear some models of behavior in usage of information system technology. This matter, neccessary evaluation on some models of behavior which appropriate with intention individual and need organization until the impact at satisfaction and improvement performance of individual and organization. Keywords: Behavior, Information System Technology, Models of Behavior