Abstract: According to TRIZ theory and analytic hierarchy process(AHP), the cause of explosion and combustion of the electric vehicle in the elevator was analyzed, and various safety countermeasures were put forward, and then a new evaluation model for the quality score assessment of each solution was established. A new car blocking system was proposed and introduced. It was found that the quality evaluation of the proposed safety countermeasures can be completed by using the evaluation model. The new type of intelligent car blocking system proposed can provide a reliable basis for elevator safety decision-making.

Key words: elevator safety; explosion and combustion of the electric vehicle; TRIZ theory; AHP; intelligent stop system