A home network system and a control method thereof. A user with a mobile station at a remote location can control a home robot and monitor security conditions and home appliance conditions at a house via a wireless network. In the home network system, the mobile station is adapted to transmit a control request message for the remote control of the home robot and monitoring-request messages for the monitoring at a house via a first network, and receive control result information related to the home robot control and monitoring information via the first network for display. A server is adapted to analyze the request messages received from the mobile station via the first network, transmit a corresponding request message to the home robot via a second network, and receive the control result information and the monitoring information from the home robot via the second network to transmit to the mobile station.