Abstracts- The constribuction of a sound cris management system has both theoretical and practical significance in crisis precdicition and precaution, proper response to crisis, and affermath rehabilitation and reconstruction. This paper briefly introduces the theory and methods of sience of complexity, and analyzes the complex system due to its large number of subjects, its overall uncertainty, its highly openness and other features like information accumulation and applicaton. Crisis is formed by the interaction of various subjects, levels and structures. It is regarded as the butterfly effect resulted from the change of initial conditions in a system. What’s more, the continuos modification of subjects’ behavioral rules also gives rise to crisis. Based on the analysis above, this paper proposes a scheme and methods for the construction of crisis management system. Keywords-science of complexity; economic society system; Crisis management