The invention discloses a CIM model-based multilevel cache method, device and system. The method comprises the following steps of: establishing a secondary multistep cache pool formed by a soft quotation pool and a weak quotation pool, so as to cache CIM objects quoted by the quotation pools, wherein the CIM objects comprise time marks for recording the current access time of the CIM objects; establishing a dynamic CIM object expiration check thread; periodically arranging the secondary multistep cache pool by the CIM object expiration check thread according to a using rate of a maximum configured memory, and releasing the checked expired CIM objects. According to the method, device and system, low-level protection threads are set for second multistep CIM object type cache pools, and CIM object cache amount is increased by utilizing available memories to a greatest extent, so that the cache opening does not influence the normal operation of systems.