Provided are a network access system and method. The system comprises a control plane node which is connected with a UE via a radio interface, connected with an MME via an S1 interface, and configured to process control plane data; and a user plane node, connected with the UE via a radio interface, connected with an SGW via an Ss interface, and configured to process user plane data. It is solved the problem in the related art that a core network is impacted because of frequent information interaction among nodes due to the fact that a user switches among cells, and then achieves the effects of reducing the information interaction among the nodes and reducing the impact on a core network signalling.