A method for managing an object-based storage system is provided. The object-based storage system includes root objects, partition objects, collection objects, user objects and function objects. The function objects include user function objects and system function objects. The user function objects respond to the client request, so that the existing data-processing tasks requested by the client are moved to the OBSD to be completed, so as to achieve the purposes for saving the network storage bandwidth and improving the security of the stored data, etc. The system function objects execute the system management function, so that the management of the bottom of disks management of the file system and database system is completed by the OBSD. That can be easily realized in automatic data backup, load balancing and other functions in the storage system. The user function objects and system function objects can be customized by the user.