A positioning method, comprising: receiving (S 110), by a mobile location center gateway, a first positioning request for positioning a terminal device from a location service client; determining, by the mobile location center gateway based on having received the first positioning request, a plurality of public land mobile networks, PLMNs, that the terminal device accesses and that serve the terminal; and determining (S 122), by the mobile location center gateway, a first target PLMN in the plurality of PLMNs, wherein the first target PLMN is for providing a location service for the terminal device; and sending, by the mobile location center gateway, a second positioning request to a first location management network element, LMF, (800, 900) in the first target PLMN, wherein the second positioning request requests the first LMF (800, 900) to provide a location service for the terminal device; characterized by: wherein the determining, by the mobile location center gateway based on the first positioning request, a plurality of PLMNs that the terminal device accesses comprises: obtaining a plurality of addresses of serving access and mobility management functions, AMFs, of the terminal device, or a plurality of addresses of serving gateway mobile location centers, GMLCs, of the terminal device; determining, by the mobile location center gateway based on the plurality of addresses of serving access and mobility management functions, AMFs, of the terminal device, or based on the plurality of addresses of serving gateway mobile location centers, GMLCs, of the terminal device, the plurality of PLMNs that the terminal accesses, wherein each of the plurality PLMNs includes an AMF that provides a service for the terminal device and a GMLC that provides a service for the terminal device. receiving (S 110), by a mobile location center gateway, a first positioning request for positioning a terminal device from a location service client; determining, by the mobile location center gateway based on having received the first positioning request, a plurality of public land mobile networks, PLMNs, that the terminal device accesses and that serve the terminal; and determining (S 122), by the mobile location center gateway, a first target PLMN in the plurality of PLMNs, wherein the first target PLMN is for providing a location service for the terminal device; and sending, by the mobile location center gateway, a second positioning request to a first location management network element, LMF, (800, 900) in the first target PLMN, wherein the second positioning request requests the first LMF (800, 900) to provide a location service for the terminal device; characterized by: wherein the determining, by the mobile location center gateway based on the first positioning request, a plurality of PLMNs that the terminal device accesses comprises: obtaining a plurality of addresses of serving access and mobility management functions, AMFs, of the terminal device, or a plurality of addresses of serving gateway mobile location centers, GMLCs, of the terminal device; determining, by the mobile location center gateway based on the plurality of addresses of serving access and mobility management functions, AMFs, of the terminal device, or based on the plurality of addresses of serving gateway mobile location centers, GMLCs, of the terminal device, the plurality of PLMNs that the terminal accesses, wherein each of the plurality PLMNs includes an AMF that provides a service for the terminal device and a GMLC that provides a service for the terminal device. obtaining a plurality of addresses of serving access and mobility management functions, AMFs, of the terminal device, or a plurality of addresses of serving gateway mobile location centers, GMLCs, of the terminal device; determining, by the mobile location center gateway based on the plurality of addresses of serving access and mobility management functions, AMFs, of the terminal device, or based on the plurality of addresses of serving gateway mobile location centers, GMLCs, of the terminal device, the plurality of PLMNs that the terminal accesses, wherein each of the plurality PLMNs includes an AMF that provides a service for the terminal device and a GMLC that provides a service for the terminal device.