The core network accessing method includes: transmitting PLMN indication information about a base station to a UE, the PLMN indication information including information about PLMNs connected to a core network of a first type and information about PLMNs connected to a core network of a second type; receiving information about a target PLMN selected by the UE in accordance with the PLMN indication information and matching the UE, and determining a target core network to be accessed in accordance with the information about the target PLMN; and interacting with the target core network and the UE, so as to enable the UE to access the target core network via the target PLMN.