A method and device for mining and evaluating vocabulary quality is disclosed. The method comprises: carrying out a document frequency (DF) distribution statistics of vocabularies for mass classified data (101); executing multiple single-angle measurements according to the DF distribution statistics of vocabularies (102); executing multi-angle measurements for vocabularies according to each single angle measurement for vocabularies to obtain importance weights of vocabularies (103). With such solution, utilizing the technology of probability and statistics and information entropy, it can mine and evaluate importance of vocabularies deeply from mass classified data and obtain vocabularies of high quality based on synthesizing all kinds of evaluations.
METHOD AND DEVICE FOR MINING AND EVALUATING VOCABULARY QUALITY