1. A method for modeling a speech recognition of common language under the influence of a plurality of dialects, the method including: (1) generating a triphone standard common-language model based on training data of standard common language, generating a first monophone dialectal-accented common-language model based on development data of dialectal-accented common language of first kind, and generating a second monophone dialectal-accented common-language model based on development data of dialectal-accented common language of second kind; (2) generating a first confusion matrix by recognizing the development data of the dialectal-accented common language of first kind using the standard common-language model, and obtaining a temporary merged model in a manner that the first dialectal-accented common-language model is merged into the standard common-language model according to the first confusion matrix; and (3) generating a second confusion matrix by recognizing the development data of the dialectal-accented common language of second kind using the temporary merged model, and obtaining a recognition model in a manner that the second dialectal-accented common-language model is merged into the temporary merged model according to the second confusion matrix.