The embodiment of the invention discloses a method and a device for determining the similarity between an inquiry sentence and a webpage, a terminal and a server. The method comprises the following steps: translating a target inquiry sentence into at least one candidate sentence having similar semantics through a pre-created phrase translation model; determining the similarity between the target inquiry sentence and a webpage topic sentence according to the similarity between the at least one candidate sentence and the webpage topic sentence, wherein the webpage topic sentence is a webpage title or a sentence for describing major webpage content obtained by resolving webpage content based on a set algorithm. By adopting the technical scheme provided by the embodiment, the webpage recall rate of any inquiry sentence by a search engine can be increased, the search engine can return webpage sets with small differences specific to inquiry sentences having different representation forms but similar semantics, and the user satisfaction of an inquiry result is improved.