The present disclosure includes a method for constructing an intelligent knowledge base. The method comprises: obtaining, via an intelligent-knowledge-base constructing device, a plurality of abstract semantic expressions, wherein each of the plurality of abstract semantic expressions comprises a semantic-lacking element; receiving an initial request message from a user; acquiring, via the intelligent-knowledge-base constructing device, one or more abstract semantic expressions corresponding to the initial request message by performing an abstract semantic recommending process on the initial request message based on the plurality of abstract semantic expressions; extracting, from the initial request message, an element corresponding to the semantic-lacking element of the one or more abstract semantic expressions; filling the extracted element into the semantic-lacking element to obtain one or more specific semantic expressions corresponding to the initial request message; and storing the initial request message and the one or more specific semantic expressions into the intelligent knowledge base.