An information management system for a home appliance comprising: a home appliance having a communication unit, a display unit, and a predetermined device ID; a wireless terminal having a communication unit for communication with the communication unit in the home appliance and a display unit, the wireless terminal interlocked with the home appliance for receiving information or a signal generated at the home appliance, or transmitting information or a signal generated at the wireless terminal in a direction of the home appliance; a server system provided to be able to communicate with the home appliance and the wireless terminal, the server system having the device ID stored therein, and a representative site provided to be able to communicate with the server system for enabling a user to provide user's information and registration information on home appliances, wherein the user registers a home appliance to the representative site, wherein the home appliance registered in the representative site is registered in the server system together with the user's information after transmission of the information from the representative site to the server system, wherein the communication unit of the home appliance and the communication unit of the wireless terminal receive/transmit a signal after a mutual authentication procedure between the home appliance and the wireless terminal and the server system is completed, and the information or signal generated at the home appliance is displayed on the display unit in the wireless terminal, or the information or signal generated at the wireless terminal is displayed on the display unit in the home appliance, or changes operational state of the home appliance. a home appliance having a communication unit, a display unit, and a predetermined device ID; a wireless terminal having a communication unit for communication with the communication unit in the home appliance and a display unit, the wireless terminal interlocked with the home appliance for receiving information or a signal generated at the home appliance, or transmitting information or a signal generated at the wireless terminal in a direction of the home appliance; a server system provided to be able to communicate with the home appliance and the wireless terminal, the server system having the device ID stored therein, and a representative site provided to be able to communicate with the server system for enabling a user to provide user's information and registration information on home appliances, wherein the user registers a home appliance to the representative site, wherein the home appliance registered in the representative site is registered in the server system together with the user's information after transmission of the information from the representative site to the server system, wherein the communication unit of the home appliance and the communication unit of the wireless terminal receive/transmit a signal after a mutual authentication procedure between the home appliance and the wireless terminal and the server system is completed, and the information or signal generated at the home appliance is displayed on the display unit in the wireless terminal, or the information or signal generated at the wireless terminal is displayed on the display unit in the home appliance, or changes operational state of the home appliance.