17. The language learning method according to claim 12 , wherein the step of extracting the pronunciation feature of the pronunciation comprises: extracting a plurality of phonemes of the pronunciation and a plurality of durations corresponding to the phonemes of the pronunciation; calculating a mean duration of each of the phonemes; calculating a plurality of duration differences between the mean durations in the pronunciation; and serving at least one of the mean durations and the duration differences of the pronunciation as the pronunciation feature of the pronunciation, wherein the step of extracting the pronunciation feature of each of the training data comprises: extracting a plurality of phonemes of each of the training data and a plurality of durations corresponding to the phonemes; calculating a mean duration of each of the phonemes of each of the training data; calculating a plurality of duration differences between the mean durations in each of the training data; and serving at least one of the mean durations and the duration differences of each of the training data as the pronunciation feature of the training data.
12. The language learning method according to claim 11 , wherein the step of extracting the pronunciation feature of each of the training data comprises: collecting a plurality of training sentences; performing a phonetic segmentation operation on the training sentences to obtain a plurality of pronunciation units of the training sentences; and obtaining the training data from the pronunciation units.