Methods, and systems for migrating personality of a computing environment from a source machine platform to a target machine platform through a CIM-based system management infrastructure. A system includes: database wherein migration rules of CIM objects between a plurality of platforms are recorded; and migration tool for implementing migration according to the migration rules in the database, which includes: migration rule extractor, CIM object extractor, migration task producer and migration task executor. The extractor extracts CIM objects related to personality of the computing environment from source machine platform according to migration rule extracted from the database by rule extractor, and extracts from the target machine platform objects corresponding to the extracted CIM objects of the source machine platform. The migration task producer generates the migration tasks according to extracted migration rules. The migration task executor executes generated migration tasks on the CIM objects of the target platform.