Disclosed herein is a home network system interoperable with a wireless terminal of at least one user registered therein, wherein a terminal server is adapted to transmit and receive data to/from the wireless terminal, and a home server is adapted to manage/control a home network and communicate with the terminal server. The terminal server detects the position of the wireless terminal and transmits and receives voice messages, text messages or multimedia data to/from the wireless terminal. The home server is connected with the terminal server over the Internet. The home server sends, to the terminal server, alarm data regarding a dangerous situation in a home where the home network is constructed, receives information regarding the position of the wireless terminal from the terminal server and displays the received position information. Therefore, a home network system user can ascertain the position of a member of his/her family carrying the wireless terminal, not at home, through the home server in the home and notify the family member of a dangerous situation occurring in the home through the wireless terminal. This has the effect of strengthening child protection and security in the home.