The invention relates to a router and method for opening a navigation page automatically. The router comprises an LAN port, an extraction module, an MAC address list, a looking-up module and a storage module. The LAN port is used for monitoring an http package sent by a terminal. The extraction module is used for extracting an MAC address in the http package when the LAN port monitors that the http package sent by the terminal is detected. The MAC address list is used for storing an MAC address which has been visited. The looking-up module is used for looking up whether the MAC address of the http package exists in the MAC address list or not; if yes, the http package is allowed to pass through, and if no, a preset navigation page is returned to. The storage module is used for storing the MAC address in the http package into the MAC address list, and can judge whether the terminal has access to the network through the router for the first time or not according to the MAC address in the http package sent by the terminal; when the terminal has access to the network through the router for the first time, the navigation page is shifted to directly, a user is reminded to install service software, and therefore the user experience is improved effectively.