A memory system comprising: a memory device having a nonvolatile specific storage space configured to store workload information including groups of parameter values, grouped respectively corresponding to a plurality of workload classes in a table form, and a controller configured to detect a ratio of a set command inputted from an outside in a set operation mode, select one of the workload classes as a detected class, load, from the specific storage space, one of the groups corresponding to the detected class, process the set command under an execution condition determined by applying the loaded group, and update the group corresponding to the detected class with parameter values inputted from the outside.