The invention discloses a dynamic security penetration test method, device and system for a business system container mirror image. The dynamic security penetration test method comprises the followingsteps: obtaining a container mirror image of each component of a to-be-tested system; selecting a corresponding penetration test script according to the attribute of the container mirror image to carry out penetration test on the container mirror image, and generating and analyzing a test result; and generating a test report according to the analysis result. The dynamic security penetration testmethod has the beneficial effects that the penetration test scripts matched with the security vulnerabilities can be selected according to the security vulnerability characteristics of different container mirror images, and the pertinence is high, and the discovery probability of the security vulnerabilities is improved, and the security risk is reduced.