A data processing system includes a host suitable for providing an access request; and a plurality of memory systems suitable for storing or reading data thereto or therefrom in response to the access request, wherein the host includes a host memory buffer suitable for storing a plurality of meta-data respectively corresponding to the plurality of memory systems, wherein each of the plurality of meta-data includes a first threshold value representing storage capacity for user data in a corresponding memory system among the plurality of memory systems, a second threshold value representing a number of read operations for logical block addresses (LBAs) of the corresponding memory system, a third threshold value representing a temperature of the corresponding memory system and respective LBAs of the plurality of memory systems.