This invention discloses a multi-strategy retrieval intelligent question-answering
system based on knowledge graphs. Through the
collaboration of question
parsing,
knowledge retrieval, answer generation, and evaluation modules, intelligent
question answering is achieved: The
system receives user questions, parses the question intent using a large
language model, and extracts entities, relation types, and query types; it then performs a multi-strategy progressive retrieval based on a
graph database knowledge graph, sequentially performing batch
exact matching of entities, batch querying of relations, full-text index search, fuzzy matching, and source file
keyword search; it scores and filters the retrieval results based on relevance; it generates answers based on the filtered knowledge using a large
language model and calculates the confidence level of the answers by integrating
multiple factors; and it implements result caching. This invention, through the
synergy of multi-strategy progressive retrieval and intelligent filtering, effectively solves the problems of inaccurate retrieval, poor answer quality, and
slow response speed in traditional question-answering systems, significantly improving the accuracy, recall, and response speed of
question answering.