A dialogue system-based method for asking a follow-up question in response to a user question, and a device, pertaining to the technical field of dialogue systems. A dialogue system is by default, provided with M follow-up question modules corresponding to N standard questions, wherein M ≥ N, and each of the follow-up question modules comprises a first sub-sentence and a second sub-sentence obtained by dividing a corresponding standard question. The method comprises: acquiring a first interrogative sentence of a first user (S202); determining, with respect to each of the M follow-up question modules, whether the first interrogative sentence matches the first sub-sentence and the second sub-sentence thereof (S204); and if the first interrogative sentence matches the first sub-sentence in the follow-up module but does not match the second sub-sentence therein, acquiring a follow-up question for the first interrogative sentence on the basis of the second sub-sentence in the follow-up question module (S206), so as to acquire multiple follow-up questions for the first interrogative sentence on the basis of the M follow-up question modules.
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