Object storage life cycle management method and system

The invention belongs to the technical field of life cycle management, and discloses an object storage life cycle management method and system, and the method comprises the steps: carrying out the prefix aggregation and expiration time aggregation of rules on a storage bucket configured with n life cycle rules, and obtaining a prefix aggregation result and an expiration time aggregation result; metadata scanning is conducted on the storage buckets regularly, if the storage buckets have metadata caches, whether the metadata caches are expired or not is judged according to an expiration time aggregation result, if the metadata caches are not expired, the metadata caches are loaded one by one, whether each metadata cache is expired or not is judged, and if the metadata caches are expired, corresponding operation of deleting or transferring storage types is conducted; if no metadata cache exists in the storage bucket, sorting the metadata matched with the prefix aggregation result according to modification time,