Method and device for discovering hot words

The invention discloses a method and a device for discovering hot words. The method comprises the following steps of presetting a hot word bank and arranging a corresponding hot word weight for each hot word in the hot word bank; expressing a document by utilizing the hot words in the hot word bank according to the word frequency of each hot word in the document and each hot word weight arranged in the hot word bank; clustering documents expressed by the hot words in the hot word bank to be document classes with preset number; carrying out focus sorting on the document classes with preset number, and filtering out the document classes with focus values being smaller than a preset focus threshold; and carrying out hot word selection on the filtered document classes according to the preset hot word selecting strategy. The method and the device for discovering the hot words are applied, so that the clustering complexity can be reduced, and the efficiency for discovering social network focuses is improved.