An image forming apparatus stores a setting values set including core data independent of a model of the image forming apparatus and non-core data not included in the core data; writes the core data on another image forming apparatus without change, and if the model of the image forming apparatus is the same as the model of the another image forming apparatus, writes the non-core data on the another image forming apparatus without change, while if the model of the image forming apparatus is not the same as the model of the another image forming apparatus, writes the non-core data including a setting value of a function setting in the non core-data that is the same as the function setting in the another image forming apparatus on the another image forming apparatus.