Security risk assessment method and device and storage medium

The invention relates to a security risk assessment method and device and a storage medium. The security risk assessment method comprises the following steps: acquiring security alarm logs and asset information of an object system comprising a plurality of security domains, and preprocessing the acquired security alarm logs and asset information; converting the preprocessed text information of the security alarm log and the asset information into Euclidean space vectors, and filtering based on cosine correlation of a security alarm log vector and an asset information vector; assigning a security level weight for each security domain based on security tag information representing a security level of the security domain; generating a typical feature vector of each security domain according to the security alarm log of each security domain in a preset time period; for each security domain, calculating an included angle cosine correlation value according to the typical feature vector and a plurality of predetermi