A service request processing method, performed by a service proxy device, the method comprising: receiving a service request from a service consumer, the service request comprising a plurality of service producer types; obtaining service producer instances respectively corresponding to the plurality of service producer types according to the service request; determining an access order of the service producer instances corresponding to the plurality of service producer types; and controlling the service producer instances corresponding to the plurality of service producer types to process the service request based on the access order, wherein the service request received from the service consumer comprises order indication information indicating an arrangement order of the plurality of service producer types, and the plurality of service producer types included in the order indication information comprise a home and a visitor service types of a session management function, SMF, or a policy control function, PCF, wherein the determining the access order of the service producer instances comprises determining, based on the arrangement order of the plurality of service producer types, the access order of the service producer instances, wherein the arrangement order indicates an order in which a service request is to be sequentially transmitted to the home and visitor service types of the SMF or the PCF, and the service request is sequentially transmitted to a next-in-order service producer instance in the arrangement order based on processing of the service request by a current service producer instance being completed, and wherein the controlling the service producer instances comprises receiving, from the current service producer instance after the current service producer instance processes the service request, a new service request including information about the next-in-order service producer instance, which is next in order in the determined access order based on the arrangement order, and transmitting the new service request to the next-in-order service producer instance. receiving a service request from a service consumer, the service request comprising a plurality of service producer types; obtaining service producer instances respectively corresponding to the plurality of service producer types according to the service request; determining an access order of the service producer instances corresponding to the plurality of service producer types; and controlling the service producer instances corresponding to the plurality of service producer types to process the service request based on the access order, wherein the service request received from the service consumer comprises order indication information indicating an arrangement order of the plurality of service producer types, and the plurality of service producer types included in the order indication information comprise a home and a visitor service types of a session management function, SMF, or a policy control function, PCF, wherein the determining the access order of the service producer instances comprises determining, based on the arrangement order of the plurality of service producer types, the access order of the service producer instances, wherein the arrangement order indicates an order in which a service request is to be sequentially transmitted to the home and visitor service types of the SMF or the PCF, and the service request is sequentially transmitted to a next-in-order service producer instance in the arrangement order based on processing of the service request by a current service producer instance being completed, and wherein the controlling the service producer instances comprises receiving, from the current service producer instance after the current service producer instance processes the service request, a new service request including information about the next-in-order service producer instance, which is next in order in the determined access order based on the arrangement order, and transmitting the new service request to the next-in-order service producer instance.