A home appliance comprising: an input unit arranged to receive an order for performing smart diagnosis of a status of the home appliance; a sound output unit arranged to output a sound signal having a predetermined frequency; a display unit arranged to output a menu and a progress state of the smart diagnosis; and a control unit arranged, when an order for performing diagnosis is inputted through the input unit, to: set up a smart diagnosis mode; create product information comprising data related to the home appliance; and drive the sound output unit to convert and output the product information as a sound signal; wherein the control unit is further arranged to: receive user-selection of one of a plurality of diagnostic devices for diagnosing the home appliance, wherein the plurality of diagnostic devices comprises at least a smartphone and a call center; and output user guides in stages for performing the diagnosis method according to the selected diagnostic device, when the smart diagnosis mode is set up; wherein when the selected diagnostic device is a smartphone, the control unit is arranged to output information on an application for smartphone diagnosis and connection information for the application, through the display unit, and when the diagnostic device is a call center, the control unit is arranged to output information on the phone number and service time of the call center through the display unit; and the control unit is arranged to output information related to the position of the sound output unit, and progress procedures and a progress state of the diagnosis, through the display unit, when the smart diagnosis is started. an input unit arranged to receive an order for performing smart diagnosis of a status of the home appliance; a sound output unit arranged to output a sound signal having a predetermined frequency; a display unit arranged to output a menu and a progress state of the smart diagnosis; and a control unit arranged, when an order for performing diagnosis is inputted through the input unit, to: set up a smart diagnosis mode; create product information comprising data related to the home appliance; and drive the sound output unit to convert and output the product information as a sound signal; wherein the control unit is further arranged to: receive user-selection of one of a plurality of diagnostic devices for diagnosing the home appliance, wherein the plurality of diagnostic devices comprises at least a smartphone and a call center; and output user guides in stages for performing the diagnosis method according to the selected diagnostic device, when the smart diagnosis mode is set up; wherein when the selected diagnostic device is a smartphone, the control unit is arranged to output information on an application for smartphone diagnosis and connection information for the application, through the display unit, and when the diagnostic device is a call center, the control unit is arranged to output information on the phone number and service time of the call center through the display unit; and the control unit is arranged to output information related to the position of the sound output unit, and progress procedures and a progress state of the diagnosis, through the display unit, when the smart diagnosis is started.