A non-call service processing method in a Circuit Switch Fallback, CSFB, system, the method comprising: transmitting (601 or 701 or 801), by a network element, a non-call service request which comprises one of a Provide Subscriber Information, PSI, service request, a called call unrelated supplementary service request or a called location service request to a first Visitor Location Register, VLR, VLR1; transmitting (602 or 702 or 802), by the VLR1, a paging request to a User Equipment, UE, through a Mobility Management Entity, MME, wherein the paging request includes a fallback mark bit for marking whether the UE falls back to a conventional circuit switch network or not; falling (603 or 703 or 803), by the UE, back to the conventional circuit switch network according to the fallback mark bit; when the UE falls back to a conventional circuit switch network and determines that its own Location Area Identity, LAI, in the conventional circuit switch network is changed, transmitting, by the UE, a location updating request to a second, VLR, VLR2 where a new LAI is located; transmitting, by the VLR2 receiving the location updating request, a location updating request to a Home Location Register, HLR; transmitting, by the HLR receiving the location updating request, a location cancellation message to the VLR1 where original LAI is located; forwarding, by the VLR1 receiving the location cancellation message, the non-call service request received to the VLR2; processing, by the VLR2, the received non-call service request, and transmitting a processing result to the VLR1; and transmitting, by the VLR1, the received processing result to the network element which transmitted the non-call service request; wherein the VLR1 receives the address of the VLR2 either from the HLR, said address being carried in the location cancellation message or directly from the VLR2, said address being carried in a Send Identity, SI, message. transmitting (601 or 701 or 801), by a network element, a non-call service request which comprises one of a Provide Subscriber Information, PSI, service request, a called call unrelated supplementary service request or a called location service request to a first Visitor Location Register, VLR, VLR1; transmitting (602 or 702 or 802), by the VLR1, a paging request to a User Equipment, UE, through a Mobility Management Entity, MME, wherein the paging request includes a fallback mark bit for marking whether the UE falls back to a conventional circuit switch network or not; falling (603 or 703 or 803), by the UE, back to the conventional circuit switch network according to the fallback mark bit; when the UE falls back to a conventional circuit switch network and determines that its own Location Area Identity, LAI, in the conventional circuit switch network is changed, transmitting, by the UE, a location updating request to a second, VLR, VLR2 where a new LAI is located; transmitting, by the VLR2 receiving the location updating request, a location updating request to a Home Location Register, HLR; transmitting, by the HLR receiving the location updating request, a location cancellation message to the VLR1 where original LAI is located; forwarding, by the VLR1 receiving the location cancellation message, the non-call service request received to the VLR2; processing, by the VLR2, the received non-call service request, and transmitting a processing result to the VLR1; and transmitting, by the VLR1, the received processing result to the network element which transmitted the non-call service request; wherein the VLR1 receives the address of the VLR2 either from the HLR, said address being carried in the location cancellation message or directly from the VLR2, said address being carried in a Send Identity, SI, message.