Abstract: A data search system in which a data processing apparatus and a data search device are communicably connected includes an operational history acquisition unit to acquire operational history data including user data, information about current data processing and the document processed, and apparatus data, an apparatus data file storage unit to store an apparatus data file including the apparatus data and registered group data identifying a group that uses the data processing apparatus, a group-apparatus associator to associate the user data with the apparatus data file, a profile generator to generate a profile specifying significance degrees of the document in relation to the data processing apparatus and the group data, based on the operational history data, the apparatus data file, and the association, a profile storage unit to store the profile, and a data search unit to perform a data search according to a data search request from the user.