Problem generation method and device for context enhancement of open domain dialogue system

The invention discloses a context-enhanced question generation method and device for an open domain dialogue system. The method is characterized by comprising the following steps of: performing vectorization semantic representation on a dialogue context as question content through a hierarchical encoder; generating a topic word related to the dialogue context; further predicting a problem mode based on the semantic representation of the dialogue context and the predicted problem content; taking an interrogative word corresponding to the problem mode obtained by prediction as initial input of a loop decoder; meanwhile, dialogue context semantics and topic word semantics being introduced through a joint attention mechanism, and under driving of a predicted problem mode, a problem being generated through a loop decoder. In the dialogue system, the preset question content and the question mode are set based on the dialogue environment, the context combination degree is enhanced, the fitness of the question genera