Abstract: Provided is a method for editing digital moving picture files in a set-top box. The set-top box receives a digital moving picture file from a contents server, splits it into predetermined data units, and stores it in database. To edit the file, the set-top box selects a specific region of the file stored in the database, and generates a new file having only region information (start address and end address) of the selected specific region in the file. When the generated new file is accessed, in the case of copy, only a region corresponding to the region information is copied, and, in the case of paste and deletion, the region information is not accessed according to information recorded in the file header of the new file. The edit using address information (file ID) on an editing region in the original file can reduce an editing time.