Method for routing services when link failure occurs temporarily on internet

PURPOSE: A routing method is provided to transmit data through a replacement path, when link failure occurs temporarily on the internet. CONSTITUTION: A routing method of the internet including a plurality of routers connected each other through a path comprises the steps of: forming a shortest link having a least link cost till a router to which a user is connected and a router of a destination, when the destination is inputted to receive a service from the user; selecting a replacement path till the destination from a previous router of a router which has link failure, when the link failure occurs while forming the shortest link; forming a link between the router to which the user is connected and the router of the destination, through the selected replacement path, and supplying a service to the user through the formed link.