A mobile terminal comprising: a display; a communication unit; a microphone; and a controller configured to: perform a control operation to transmit a request for management data to a home appliance through the communication unit based on a management mode input and to display a management data screen on the display based on first sound acquired from the home appliance through the microphone; and perform a control operation to transmit a request for diagnostic data to the home appliance through the communication unit based on a diagnosis mode input and to display a diagnostic data screen on the display based on second sound acquired from the home appliance through the microphone, wherein the home appliance is an air conditioner and: the management data screen includes operation information including an operation mode, a flow rate, a desired temperature, and an indoor temperature; a recommended operation information including a recommended mode, a desired temperature and a flow rate; a power consumption information including an instantaneous power and an accumulated power; and an error information, and the diagnostic data screen includes an outdoor unit temperature information, a compressor discharge temperature information, a outdoor fan speed information, an indoor fan operation mode information, an error occurrence information, an indoor temperature information, a power consumption information, a compressor frequency information, an input voltage information, a DC-terminal voltage information, an input current information, and an EEV pulse information. a display; a communication unit; a microphone; and a controller configured to: perform a control operation to transmit a request for management data to a home appliance through the communication unit based on a management mode input and to display a management data screen on the display based on first sound acquired from the home appliance through the microphone; and perform a control operation to transmit a request for diagnostic data to the home appliance through the communication unit based on a diagnosis mode input and to display a diagnostic data screen on the display based on second sound acquired from the home appliance through the microphone, wherein the home appliance is an air conditioner and: the management data screen includes operation information including an operation mode, a flow rate, a desired temperature, and an indoor temperature; a recommended operation information including a recommended mode, a desired temperature and a flow rate; a power consumption information including an instantaneous power and an accumulated power; and an error information, and the diagnostic data screen includes an outdoor unit temperature information, a compressor discharge temperature information, a outdoor fan speed information, an indoor fan operation mode information, an error occurrence information, an indoor temperature information, a power consumption information, a compressor frequency information, an input voltage information, a DC-terminal voltage information, an input current information, and an EEV pulse information. perform a control operation to transmit a request for management data to a home appliance through the communication unit based on a management mode input and to display a management data screen on the display based on first sound acquired from the home appliance through the microphone; and perform a control operation to transmit a request for diagnostic data to the home appliance through the communication unit based on a diagnosis mode input and to display a diagnostic data screen on the display based on second sound acquired from the home appliance through the microphone, wherein the home appliance is an air conditioner and: the management data screen includes operation information including an operation mode, a flow rate, a desired temperature, and an indoor temperature; a recommended operation information including a recommended mode, a desired temperature and a flow rate; a power consumption information including an instantaneous power and an accumulated power; and an error information, and the diagnostic data screen includes an outdoor unit temperature information, a compressor discharge temperature information, a outdoor fan speed information, an indoor fan operation mode information, an error occurrence information, an indoor temperature information, a power consumption information, a compressor frequency information, an input voltage information, a DC-terminal voltage information, an input current information, and an EEV pulse information. the management data screen includes operation information including an operation mode, a flow rate, a desired temperature, and an indoor temperature; a recommended operation information including a recommended mode, a desired temperature and a flow rate; a power consumption information including an instantaneous power and an accumulated power; and an error information, and the diagnostic data screen includes an outdoor unit temperature information, a compressor discharge temperature information, a outdoor fan speed information, an indoor fan operation mode information, an error occurrence information, an indoor temperature information, a power consumption information, a compressor frequency information, an input voltage information, a DC-terminal voltage information, an input current information, and an EEV pulse information.