A method for processing device faults, comprising: receiving, by a serving gateway, S-GW, a connection deletion request message sent by a network device in the case of a fault, wherein the connection deletion request message comprises a fully qualified connection set identifier, FQ-CSID; locally deleting, by the S-GW, a packet data network, PDN, connection related to the FQ-CSID, or retaining, by the S-GW, a PDN connection related to the FQ-CSID and receiving, by the S-GW, downlink data corresponding to the PDN connection; determining, by the S-GW, according to the FQ-CSID, whether all or partial PDN connections of a user equipment, UE, related to the fault are locally deleted by the network device; and performing (103a, 103b), by the S-GW, a network-triggered service recovery procedure, wherein the performing (103a, 103b) a network-triggered service recovery procedure comprises: when determining, by the S-GW, according to the FQ-CSID, that all PDN connections of the UE related to the fault are locally deleted by the network device, sending, by the S-GW, a first message to the network device, for instructing the network device to trigger the UE to initiate an attach procedure; and when determining, by the S-GW, according to the FQ-CSID, that partial PDN connections of the UE related to the fault are locally deleted by the network device, sending, by the S-GW, a second message to the network device for instructing the network device to perform a PDN connection reestablishment procedure, or sending, by the S-GW, a third message to the network device for instructing the network device to perform a network-triggered service request procedure. receiving, by a serving gateway, S-GW, a connection deletion request message sent by a network device in the case of a fault, wherein the connection deletion request message comprises a fully qualified connection set identifier, FQ-CSID; locally deleting, by the S-GW, a packet data network, PDN, connection related to the FQ-CSID, or retaining, by the S-GW, a PDN connection related to the FQ-CSID and receiving, by the S-GW, downlink data corresponding to the PDN connection; determining, by the S-GW, according to the FQ-CSID, whether all or partial PDN connections of a user equipment, UE, related to the fault are locally deleted by the network device; and performing (103a, 103b), by the S-GW, a network-triggered service recovery procedure, wherein the performing (103a, 103b) a network-triggered service recovery procedure comprises: when determining, by the S-GW, according to the FQ-CSID, that all PDN connections of the UE related to the fault are locally deleted by the network device, sending, by the S-GW, a first message to the network device, for instructing the network device to trigger the UE to initiate an attach procedure; and when determining, by the S-GW, according to the FQ-CSID, that partial PDN connections of the UE related to the fault are locally deleted by the network device, sending, by the S-GW, a second message to the network device for instructing the network device to perform a PDN connection reestablishment procedure, or sending, by the S-GW, a third message to the network device for instructing the network device to perform a network-triggered service request procedure. when determining, by the S-GW, according to the FQ-CSID, that all PDN connections of the UE related to the fault are locally deleted by the network device, sending, by the S-GW, a first message to the network device, for instructing the network device to trigger the UE to initiate an attach procedure; and when determining, by the S-GW, according to the FQ-CSID, that partial PDN connections of the UE related to the fault are locally deleted by the network device, sending, by the S-GW, a second message to the network device for instructing the network device to perform a PDN connection reestablishment procedure, or sending, by the S-GW, a third message to the network device for instructing the network device to perform a network-triggered service request procedure.