The invention provides a method for setting up routing information. The method includes the steps that a monitoring node requests information of each 
network segment in an outer network from a 
network management platform; the 
network management platform generates temporary user names and passwords after receiving the request and sends the temporary user names and the passwords to the monitoring node; the 
network management platform sends the information of each 
network segment in the outer network to the monitoring node; the network management platform sends the temporary user names and passwords of the monitoring node to a proxy 
router; the monitoring node launches tunnel connection towards the proxy 
router, and the temporary user names and passwords are sent to the proxy 
router in the process of tunnel connection; the proxy router judges whether the monitoring node launching the tunnel connection is legal or not according to the temporary user names and passwords, and if yes, tunnel connection is established between the proxy router and the monitoring node; routing information is generated locally according to 
network segment information sent by the network management platform, a network gate is the proxy router, and an outcoming interface points to a tunnel. The 
system applying the method for setting up routing information by the monitoring node is good in performance, simple, easy to use and safe.