A data collection device according to one embodiment comprises: an acquisition unit that acquires data when the data is stored in a shared storage region that can be used by one or more users; a determination unit that determines whether the format of the data acquired by the acquisition unit is a format by which text included in the data can be extracted by a prescribed library; an extraction unit that extracts the text included in the data through a text extraction method corresponding to the determination result determined by the determination unit; and a storage unit that stores the text extracted by the extraction unit in a database as training data for a machine learning model that realizes a natural language processing task.