Embodiments of the present invention provide a runner defect intelligent diagnosis and evaluation method based on a
knowledge graph, comprising the following steps: collecting basic information including data, pictures, standards, and regulations related to design, manufacturing, testing, acceptance, operation, and maintenance of a runner of a hydro
turbine generator set; by means of analysis and screening, reviewing and retaining data having high reliability and practicality; on the basis of the data, pictures, standards, and regulations and a similar case, extracting, from the data, defect diagnosis related service knowledge as well as entities, relations, and attributes, and constructing a defect diagnosis concept graph and a defect diagnosis entity graph; and sorting defect diagnosis knowledge points, performing
semantic representation on runner defect diagnosis knowledge, and establishing a diagnosis rule
knowledge base. According to the present invention, a repetition
semantic matching model is used to perform text and extraction
rule matching for different defects so that a relation instance of defect representation features can be obtained, the defect of a runner is evaluated on the basis of the relation instance and an accurate diagnosis result is obtained, so as to guide production.