Software project risk management, running through the whole course of software project life circle, is a set of systems of strategy, method, technology and tool which guarantees software projects to go as planned. As the component of regular project management, it obviously contains such activities as risk identification, evaluation, sorting, schedule, supervision, control, etc. In recent years, the study on software project risk management, attracting wide attention at home and abroad, mainly focuses on risk management theoretical system and supporting technology for risk management. The former pays more attention on the research of aspects like risk management theoretical system and frame, while the latter emphasizes to discuss how to realize management model mentioned above with the proper method. At present, the latter researches concentrate on supporting technology of risk analysis. The focus of theses researches lies in some micro-aspects such as happening probability, risk level and the loses due to risk. While profound macroscopic researches on risk occurrence mechanism, evolution and so on are not illustrated enough yet. Therefore, it is difficult to explain the project adversity, crisis phenomenon, inner course and strategy