Tape library based data protection system and method

The invention relates to a tape library based data protection system and method. The data protection system comprises a data backup server and a tape library, wherein the data backup server comprises a backup data storage module, a data archiving module and a position database, the backup data storage module is used for storing data backed up on a production server and a corresponding time point data set; the data archiving module is used for establishing a data archiving task, archiving data stored in the backup data storage module to the tape library according to the data archiving task by taking the time point data set as a unit and also recording the position of each data object in the tape library; the position database is used for storing positions of the data objects in the tape library. Compared with the prior art, the tape library based data protection system and method can effectively protect data, can reduce the cost by utilizing advantages of a tape and also facilitate management of data in the tape.