Office file storing and taking method and system

The invention discloses an office file storing and taking method. The method comprises a classified management storage method and a file taking method. An office file storing and taking system comprises a lifting machine and a ceiling file storage area, wherein a file cabinet drawer is arranged below the lifting machine, the file cabinet drawer can just accommodate a file box, an RFID reader is arranged above the drawer, a drawer roller for feeding the file box in or out is arranged on the file cabinet drawer, and the bottom of a lift car of the lifting machine is provided with a lift car roller used for conveying the file box in or out; and the ceiling file storage area comprises a keel, a track, an RGV and cargo cells, wherein the track and the cargo cells are arranged on the keel, the cargo units are used for storing the file box, and the cargo cells are located on the two sides of the track, the RGV is used for running on the track, and the RGV is provided with a stretching belt used for feeding the file