Provided are a method for synchronization of UGC master and backup data and a system there of, and a computer storage medium. The method includes the steps of: determining, when performing data synchronization of a master storage site and a backup site of UGC data, whether a version identifier stored satisfies a predetermined full synchronization condition, the version identifier corresponding to UGC data update of each user identifier in the master storage site; acquiring, when it is determined that the version identifier stored satisfies the predetermined full synchronization condition, from the master storage site full amount of UGC data corresponding to the user identifier, and synchronizing the UGC data to the backup site; otherwise, acquiring from the master storage site the UGC update data corresponding to the user identifier, and synchronizing the UGC update data to the backup site. By the method and system, synchronization consistency of the UGC master and backup data is realized, and the synchronization data will not occupy excessive communication resources; thereby the influence of UGC data expansion on the synchronization efficiency is relatively low.

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