The invention provides a data maintenance method, device and system. The method comprises the following steps of: displaying to-be-imported fields to a user; receiving a plurality of data sets input by the user according to the to-be-imported field, wherein each data set comprises data corresponding to each field; drawing the data corresponding to each field by using an ownerdraw technology of a listview control so as to generate a data display page, and displaying the data to the user according to piece and field; and receiving confirmation information input by the user after checking the data to be errorless through the data display page, and storing the data into the database according to the confirmation information. According to the data maintenance method, device and system provided by the invention, the display and storage of mass data can be rapidly and logically realized, so that the visibility, safety and convenience of data import are greatly improved, and the data maintenance efficiency is effectively improved.