A method and a system for a relay node to access a network are provided, and are related to the field of communications technology. The invention is disclosed in order to solve the problem that the RN cannot access the network directly in the prior art. The method for the RN to access the network includes: receiving, by a base station, a network access message including information for identifying the RN (101); enabling, according to the information for identifying the RN (102), the RN waiting for access to access the network. Through the method, the RN can access the network directly through the base station.