Grammatical error correcting system and grammatical error correcting method using the same

A grammatical error correcting method, comprising

• a learning step of generating a learning model which is a reference for diagnosing a grammatical error from a plurality of corpuses and an executing step of predicting the grammatical error with respect to the corpus input by a learner by using the learning model,
• wherein the learning step comprises:
• a context feature extracting step of extracting the plurality of context features according to a linguistic characteristic by receiving the plurality of corpuses;
• a basic classification learning step of generating one or more primary learning classification models regarding a grammatical error pattern and an error classification as a reference for diagnosing the grammatical error through the iterative learning technique from the plurality of context features;
• and
• a meta classification learning step of generating one or more secondary learning classification models through the iterative learning technique by using primary prediction result information which primarily predicts the grammatical error with respect to the corpus input by the learner by using the plurality of extracted context features, and
• the executing step comprises:
• a context feature extracting step of extracting a plurality of context features with respect to a corpus input by the learner;
• a primary prediction step of primarily predicting the grammatical error for the input corpus of the learner by selecting the primary learning classification model corresponding to the extracted context feature among the primary learning classification models generated in the basic classification learning step and outputting a primary prediction result;
• and
• a secondary prediction step of predicting the grammatical error for the input corpus of the learner by using the secondary learning classification model and outputting result information thereof when it is determined that the primary prediction result information is not the grammatical error.