The invention discloses an edge computing terminal security assessment method, a device and equipment and a storage medium, and the assessment method comprises the steps: carrying out the quantification of a threat node of an edge computing terminal according to a preset standard, and carrying out the calculation to obtain the prior probability of the threat node; calculating the conditional probability of the threat node according to the node relationship of the threat node; and evaluating the security of the edge computing terminal according to the prior probability and the conditional probability. By implementing the method and the device, the threat nodes are quantified, the association relationship among the threat nodes is also considered, the accuracy of security assessment is improved, and meanwhile, the method and the device have good expandability and are suitable for scenes of massive heterogeneous terminal access and large-scale terminal application in a power Internet-of-things environment.