It is of importance to investigate the effect of couplings between fields and structures on emergent properties of complex systems,because such couplings can be used to describe one of the common features of various complex systems.Namely,these systems have two basic interactions,one of which is the interaction between individuals,and the other of which is the interaction between individuals and environments.Here,some emergent features of complex systems were reviewed with a focus on the effect of such couplings.These emergent features are not only useful for developing specific systems,but also of potential value for establishing the universal theory for describing various kinds of complex systems.