详细介绍了系统工程风险评估方法及其应用的现状和进展，对各种方法的适用范围及优缺点作了说明，讨论了风险评估方法研究中的几个技术问题，指出目前风险评估方法要解决的问题和今后的研究方向。

A comprehensive introduction about present situation and future development of the risk assessment methods for systems engineering is presented. The advantages, shortcomings and the application scope of these methods are narrated. Several technical issues on the research of the risk assessment methods are discussed. At last, questions to be settled and the future research direction about them are proposed.