The text mining method includes a step of extracting a word from text data, a step of generating an air matrix for the extracted word, a step of generating an air network based on the generated air matrix, and the generated air network. And a step of displaying a screen. When an instruction for designating a target word is input in the first screen including the first air network based on the entire designated text data, a word is extracted from limited text data comprising a portion including the target word among the designated text data, A second air matrix is generated using the limited text data for the extracted word, a second air network is generated based on the second air matrix, and a second screen including the second air network is displayed.
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