A home appliance comprises a communication circuitry configured to be operable in a first mode or a second mode, an input unit including a button to receive an input to control the home appliance, a memory and at least one processor to control the communication circuitry to operate in the first mode in response to detecting the button being pressed, establish a first communication interface with an external terminal, obtain network set-up information including a Service Set Identifier (SSID) of an external wireless access point apparatus and authentication information, the SSID is selected via the external terminal and the authentication information was previously stored in the external terminal, control the communication circuitry to operate in the second mode, establish a second communication interface with the external wireless access point apparatus using the stored network set-up information and control the communication circuitry to access an external server.