1. A video apparatus having a learning function, comprising: a learning data base in which vocabulary learning data and vocabulary learning data reading index are stored; a caption processing part for processing video data to be displayed on a screen in a caption form; a control part for reading the vocabulary learning data corresponding to contents set by a user, if a learning function demand is made by the user, and for controlling said caption processing part to display the vocabulary learning data on the screen in the caption form; a switching part for inputting an output signal from said caption processing part and a video apparatus control OSD signal, respectively and for selectively outputting the inputted signals in accordance with the switching signal of said control part; and a video processing part for inputting an output signal of said switching part and a broadcasting video signal, respectively and for performing a video signal processing for the inputted signals to be displayed on the screen.