The embodiment of the invention provides a security vulnerability discovery method and device based on multi-mode matching and an electronic device, and belongs to the technical field of network security, and the method comprises the steps: receiving a security authentication request sent by a security management module from second equipment in first equipment; based on the security authenticationrequest, scanning a security environment of a first device, determining a current first state of the first device, and sending a security state indication to a second device, the security state indication comprising a first data field of one of a plurality of security modes; obtaining a second state determined by the second device for the safety state indication, and communicating with the seconddevice based on the second state, the second state being used for describing the safety condition of the first device; and performing security management on the first device based on the second state. Through the processing scheme provided by the invention, the safety of the equipment is improved.