Home appliance and online system including the same

A method of using an online system comprising:

• transmitting user information to a server through an external terminal to log in to the server;
• the server specifying a home appliance for a remote service based on the user information received from the external terminal and determining a remote service activation state of the specified home appliance;
• upon determining that the remote service activation of the home appliance is set, the server receiving state information of the home appliance from the home appliance and transmitting the received state information of the home appliance to the external terminal;
• and
• receiving and displaying the state information of the home appliance on the external terminal.

An online service system comprising:

• a server;
• a home appliance having a Wi-Fi communication module communication connected to the server and a remote service activation input unit to set or cancel remote service activation;
• and
• an external terminal configured to receive operation information of the home appliance from the server only in a case in which the remote service activation of the home appliance is set, to set the operation information, and to transmit a command signal to the server such that the home appliance is operated based on the set operation information, thereby remotely controlling the home appliance.