The invention discloses a construction method of an intelligent
question answering system based on a lightweight
large model, and relates to the technical field of
natural language processing, and the method comprises the steps: receiving a
natural language question of a user, carrying out vector coding through a lightweight BERT model, calculating the
cosine similarity of the
natural language question and a business index vector, and generating a structured
semantic map; converting the structured
semantic map into a scene
feature vector, and injecting the scene
feature vector into an adapter parameter block to construct a lightweight scene
adaptation model; the lightweight scene
adaptation model is combined with a real-
time data interface to obtain a structured multi-
modal response and construct an index tracking tree; and based on the unexpanded nodes of the index tracking tree, actively initiating scene migration type questions through a questioning strategy engine, obtaining target scene feature vectors, performing deep analysis, and generating a deep question and answer analysis report. According to the method, the lightweight scene
adaptation model is constructed, calculation logic is flexibly adjusted according to different service scene features, and the self-adaptive
processing capability of a
single model to multiple service scenes is achieved.