The present invention discloses a method and a system for managing a home network. The control unit of a home network management system receives the service information between an external network and a home network device and transmits the service information to the log unit which then records the service information; and the control unit or the administrator manages the home network, for example updates the recording criteria and/or the filter criteria according to the service information stored in the log unit. The present invention can obtain the utilization frequency and status of a home network service, and determine whether the inappropriate information is communicated between a home network device and an external network, so that an administrator or the home network management system can take related management measure and thereby effectively manage the home network.