We can improve the processing, the evaluation of capability and promote the user's trust by using system security engineering capability maturity model (SSE-CMM) . SSE-CMM is the common method for organizing and implementing safety engineering, and it is a mature method for system safety en- gineering. Combining capability maturity model (CMM) with total quality management and statistic theo- ry, SSE-CMM turns systems security engineering into a well-defined, mature, measurable, advanced engi- neering discipline. Lack of domain knowledge, ...