1. A method of constructing a model of recognizing English pronunciation variations, for recognizing English pronunciations with intonations influenced by different native languages, the method at least comprising: providing a plurality of English expressions and at least one phonetic alphabet corresponding to each of the English expressions, and collecting a plurality of corresponding sound information according to the phonetic alphabet of the English expression; corresponding phonetic alphabets of the native language and English to a plurality of international phonetic alphabets (IPAs), so as to form a plurality of pronunciation models; converting the sound information of each of the English expressions by using the pronunciation models, and constructing a pronunciation variation network corresponding to the English expression with reference to the phonetic alphabet of the English expression, so as to detect whether the English expression has a pronunciation variation path; and summarizing the pronunciation variation paths to form a plurality of pronunciation variation rules.