Under the guidance of system theory

safety impact assessment is a "inquiry-based problem approach"

which is from whole to part and follow the layers of in-depth as the system entirety

the system structure and the system elements; while the problem-solving process of practical application is from part to whole and concerns on the "systematic thinking model" comprehensively like the uncertainty distribution analysis of system elements

the dynamic changes of system structure and the description trend analysis of system entirety. By the mapping and inverse mapping between system theory and engineering problem

the assessment method of safety impact in solving complex polymer materials engineering problems is established in this paper. Taking the assessment of death probability of polymer material fire accident as an example

the design and application of safety impact assessment for specific engineering problem solutions is described in detail.