A data storing system and data processing method of the informational household appliance are provided. The system includes: one or plurality of home database server of informational household appliance which connected with each other, one or plurality of household gateway server, and one or plurality of data managing server of informational household appliance. The data processing method includes: the data processing method of the informational household appliance on-lining, off-lining and status data updating thereof, and the current status of informational household appliance in real-time reflects to the data managing server of informational household appliance through the household gateway server by this data processing method. The data of the informational household appliance can be stored separately from the informational household appliance, and the data of the informational household appliance can be unitedly managed by the system and method.