A home appliance diagnosis system, comprising: a mobile device (2, 400); and a home appliance, the home appliance comprising: a controller arranged to process state data, which is raw data representing an operation state of the home appliance, and output diagnosis result data representing whether an error has occurred in the home appliance; and a tag unit comprising a tag storage unit arranged to store the state data and the diagnosis result data, the tag unit also comprising a transmitting and receiving unit arranged to transmit the state data and the diagnosis result data to the mobile device (2, 400) when the mobile device is tagged with the tag unit, wherein the mobile device (2, 400) comprises a communication device arranged to tag with the tag unit and receive the state data and the diagnosis result data, the mobile device (2, 400) further comprising a display (340, 451) arranged to display data received by the communication device, wherein the system is characterized in that: the controller of the home appliance is arranged to update the state data and the diagnosis result data at the tag unit when at least one predetermined event occurs; and the mobile device (2, 400) is configured to display a plurality of tabs and display a plurality of the state data and diagnosis result data to correspond thereto, wherein each state data and diagnosis result data is a detection result detected at a plurality of time points, wherein each detection result detected at the plurality of time points is a result detected at a time point in which the at least one predetermined event occurs. a mobile device (2, 400); and a home appliance, the home appliance comprising: a controller arranged to process state data, which is raw data representing an operation state of the home appliance, and output diagnosis result data representing whether an error has occurred in the home appliance; and a tag unit comprising a tag storage unit arranged to store the state data and the diagnosis result data, the tag unit also comprising a transmitting and receiving unit arranged to transmit the state data and the diagnosis result data to the mobile device (2, 400) when the mobile device is tagged with the tag unit, a controller arranged to process state data, which is raw data representing an operation state of the home appliance, and output diagnosis result data representing whether an error has occurred in the home appliance; and a tag unit comprising a tag storage unit arranged to store the state data and the diagnosis result data, the tag unit also comprising a transmitting and receiving unit arranged to transmit the state data and the diagnosis result data to the mobile device (2, 400) when the mobile device is tagged with the tag unit, wherein the mobile device (2, 400) comprises a communication device arranged to tag with the tag unit and receive the state data and the diagnosis result data, the mobile device (2, 400) further comprising a display (340, 451) arranged to display data received by the communication device, wherein the system is characterized in that: the controller of the home appliance is arranged to update the state data and the diagnosis result data at the tag unit when at least one predetermined event occurs; and the mobile device (2, 400) is configured to display a plurality of tabs and display a plurality of the state data and diagnosis result data to correspond thereto, wherein each state data and diagnosis result data is a detection result detected at a plurality of time points, wherein each detection result detected at the plurality of time points is a result detected at a time point in which the at least one predetermined event occurs. the controller of the home appliance is arranged to update the state data and the diagnosis result data at the tag unit when at least one predetermined event occurs; and the mobile device (2, 400) is configured to display a plurality of tabs and display a plurality of the state data and diagnosis result data to correspond thereto, wherein each state data and diagnosis result data is a detection result detected at a plurality of time points, wherein each detection result detected at the plurality of time points is a result detected at a time point in which the at least one predetermined event occurs.