The system emulation discipline is a specialized discipline which studies the complex system in the virtual space.The fields of study can be divided into the study of the system(concept) model/element model/universal module of the basic theories,the building of the emulation environment and the model management of the element model/universal module of the applied theories,the emulation study of the concrete system and concrete mission of engineering(technological) application,as well as the field of applied study of the popularization of the system(concept) model which is obtained and verified in the emulation study.The development of the discipline can be divided into four stages: the stage of application of emulation technology;the stage of study of the universal emulation environment for coordination/integration;the stage of study of the system(concept) model/element model/universal module which is independent to the emulation environment;and finally the highly comprehensive stage which provides the dynamic standard model base.