The invention discloses a
root cause analysis method and device based on a large
language model, equipment and a medium. The method comprises the steps that a target entity and a topological relation are extracted in response to a
root cause analysis request; searching matched historical
root cause cases in a vector
database, inputting the topological relation, the historical root cause cases and cue words into a large
language model to generate a doubtful point
list, and extracting downstream entities in the doubtful point
list; calling a detection tool to collect entity diagnosis data and identify abnormal downstream entities; returning to execute the operation of retrieving the historical root cause case until a preset iteration ending condition is met; and inputting the final doubtful point
list, the abnormal diagnosis data, the topological relation and the historical root cause case into the large
language model again to obtain a root cause reasoning result and generate a root cause report. According to the embodiment of the invention, through the full-chain design of
natural language understanding, topological constraint, historical cases, dynamic detection and iterative reasoning, the fault positioning efficiency and the root cause accuracy are improved, and the operation and maintenance labor cost and the service fault time consumption are remarkably reduced.