Disclosed is a learning data base building method which can achieve data update in an optimum memory size and simultaneously build a systematic data configuration. Moreover, a video apparatus having a learning function and learning function control method therefor which can provide systematic, simple and effective learning by using a learning data base. The learning data base building method includes the steps of arranging vocabulary data in order of frequency in use thereof, grouping the arranged vocabulary data classified by subjects, and producing index for reading in consecutive order the groups of the vocabulary data classified by subjects.