A method for implementing network capability exposure, performed by a target user plane node, the method comprises: receiving (S181) a downlink data packet transmitted by an application server, the downlink data packet comprising a network information obtaining request; generating (S182) response information in response to the network information obtaining request, the response information comprising network information requested by the network information obtaining request; and transmitting (S183) the response information to the application server, characterized in that the method further comprises: recording Internet Protocol five-tuple information of the downlink data packet and an identification field of an Internet Protocol header of the downlink data packet, wherein generating (S182) the response information in response to the network information obtaining request comprises: obtaining the requested network information according to the network information obtaining request; generating an uplink dummy data packet when a length of the network information is less than or equal to a first length, the uplink dummy data packet comprising an Internet Protocol header, a source address and a destination address of the uplink dummy data packet being respectively set as a destination address and a source address of the downlink data packet; adding an Internet Protocol option to the Internet Protocol header of the uplink dummy data packet; and writing the network information in a data area of the Internet Protocol option of the uplink dummy data packet for generating the response information. receiving (S181) a downlink data packet transmitted by an application server, the downlink data packet comprising a network information obtaining request; generating (S182) response information in response to the network information obtaining request, the response information comprising network information requested by the network information obtaining request; and transmitting (S183) the response information to the application server, characterized in that the method further comprises: recording Internet Protocol five-tuple information of the downlink data packet and an identification field of an Internet Protocol header of the downlink data packet, wherein generating (S182) the response information in response to the network information obtaining request comprises: obtaining the requested network information according to the network information obtaining request; generating an uplink dummy data packet when a length of the network information is less than or equal to a first length, the uplink dummy data packet comprising an Internet Protocol header, a source address and a destination address of the uplink dummy data packet being respectively set as a destination address and a source address of the downlink data packet; adding an Internet Protocol option to the Internet Protocol header of the uplink dummy data packet; and writing the network information in a data area of the Internet Protocol option of the uplink dummy data packet for generating the response information. obtaining the requested network information according to the network information obtaining request; generating an uplink dummy data packet when a length of the network information is less than or equal to a first length, the uplink dummy data packet comprising an Internet Protocol header, a source address and a destination address of the uplink dummy data packet being respectively set as a destination address and a source address of the downlink data packet; adding an Internet Protocol option to the Internet Protocol header of the uplink dummy data packet; and writing the network information in a data area of the Internet Protocol option of the uplink dummy data packet for generating the response information. <EOS>