A network access method, comprising: receiving a relay access verification request sent by a relay terminal, wherein the relay access verification request is sent by the relay terminal after a relay connection request sent by a terminal is received; verifying, according to the relay access verification request, whether the terminal is authorized to perform network access by using the relay terminal; and sending a relay authorization response message to the relay terminal, wherein the relay authorization response message carries indication information indicating whether the terminal is allowed to perform network access by using the relay terminal, wherein if the terminal is authorized to perform network access by using the relay terminal, after the sending a relay authorization response message to the relay terminal, the method comprises: sending, to the relay terminal, at least one network address that the terminal is allowed to access, so that the relay terminal sends the at least one network address to the terminal, wherein the at least one network address comprises: a network address of a trunking communications server, wherein the trunking communications server is a trunking communications server corresponding to a trunking communications group to which the terminal belongs, and there is at least one trunking communications server, wherein the at least one trunking communications server is responsible for call management of trunking communications and is configured to send trunking communications information to the terminal in a multimedia broadcast multicast servicr manner or in a unicast manner by using the relay terminal. receiving a relay access verification request sent by a relay terminal, wherein the relay access verification request is sent by the relay terminal after a relay connection request sent by a terminal is received; verifying, according to the relay access verification request, whether the terminal is authorized to perform network access by using the relay terminal; and sending a relay authorization response message to the relay terminal, wherein the relay authorization response message carries indication information indicating whether the terminal is allowed to perform network access by using the relay terminal, wherein if the terminal is authorized to perform network access by using the relay terminal, after the sending a relay authorization response message to the relay terminal, the method comprises: sending, to the relay terminal, at least one network address that the terminal is allowed to access, so that the relay terminal sends the at least one network address to the terminal, wherein the at least one network address comprises: a network address of a trunking communications server, wherein the trunking communications server is a trunking communications server corresponding to a trunking communications group to which the terminal belongs, and there is at least one trunking communications server, wherein the at least one trunking communications server is responsible for call management of trunking communications and is configured to send trunking communications information to the terminal in a multimedia broadcast multicast servicr manner or in a unicast manner by using the relay terminal.