A data processing system may include a host including a host memory and a first map manager and a memory system including a controller having a second map manager and a memory device suitable for storing system data. When the host provides a first mode request to the memory system, the memory system may provide the system data to the host in response to the first mode request and may deactivate the second map manager in response to the first mode request, and the host may store, in the host memory, the system data provided from the memory system, and may activate the first map manager when providing the first mode request.