Probability determination method and device, storage medium and electronic device

The invention discloses a probability determination method and device, a storage medium and an electronic device, and relates to the technical field of smart home, and the method comprises the steps: constructing a network topological graph of a system accident according to an evaluation rule of the system accident, and enabling the network topological graph to have a network topological relation of a plurality of nodes, the plurality of nodes comprise a target node corresponding to the system accident and a node corresponding to an event having a causal relationship with the system accident; the evaluation rule is used for describing the occurrence condition of the system accident; determining a probability set corresponding to the network topological graph, wherein the probability set comprises a prior probability of an event corresponding to each leaf node in the network topological graph and a conditional probability set corresponding to each non-leaf node in the network topological graph; and determining