Abstract: Provided are a grammatical error correcting system and a grammatical error correcting method using the same, and in detail, the grammatical error correcting system includes: a learning unit configured to acquire a plurality of context features according to a linguistic characteristic from a plurality of corpuses and generate a primary learning classification model and a secondary learning classification model which are references of diagnosing a grammatical error from the context features; and an executing unit configured to predict the grammatical error with respect to a corpus which is input by a learner by using the primary learning classification model, predict the grammatical error by using a primary prediction result of the grammatical error and the secondary learning classification model, and correct the grammatical error, in which the secondary learning classification model is generated by an iterative learning technique by using the plurality of context features extracted from the plurality of corpus