A method for controlling a service chain of a service flow, wherein the method comprises: receiving, by a service chain management system, a service processing customization request message sent by a content provider server/service provider server; generating (202, 603), by the service chain management system according to a service processing customization condition carried in the service processing customization request message, service chain information of a service flow corresponding to the content provider server/service provider server; and constructing, by the service chain management system based on the service chain information, service chain control information corresponding to a service chain, so that a controller acquires the service chain control information and sends flow forwarding policy information corresponding to the service chain to a switch based on the service chain control information, so that the switch processes, according to the flow forwarding policy information, a received service flow corresponding to the content provider server/service provider server; wherein the service processing customization condition comprises: content provider server/service provider server identification information; or content provider/service provider identification information and a service processing type corresponding to a service flow provided by the content provider server/service provider server; or content provider server/service provider server identification information and a service type corresponding to the content provider server/service provider server; or content provider/service provider identification information, a service processing type corresponding to a service flow provided by the content provider server/service provider server, and a service type corresponding to the content provider server/service provider server. receiving, by a service chain management system, a service processing customization request message sent by a content provider server/service provider server; generating (202, 603), by the service chain management system according to a service processing customization condition carried in the service processing customization request message, service chain information of a service flow corresponding to the content provider server/service provider server; and constructing, by the service chain management system based on the service chain information, service chain control information corresponding to a service chain, so that a controller acquires the service chain control information and sends flow forwarding policy information corresponding to the service chain to a switch based on the service chain control information, so that the switch processes, according to the flow forwarding policy information, a received service flow corresponding to the content provider server/service provider server; wherein the service processing customization condition comprises: content provider server/service provider server identification information; or content provider/service provider identification information and a service processing type corresponding to a service flow provided by the content provider server/service provider server; or content provider server/service provider server identification information and a service type corresponding to the content provider server/service provider server; or content provider/service provider identification information, a service processing type corresponding to a service flow provided by the content provider server/service provider server, and a service type corresponding to the content provider server/service provider server. content provider server/service provider server identification information; or content provider/service provider identification information and a service processing type corresponding to a service flow provided by the content provider server/service provider server; or content provider server/service provider server identification information and a service type corresponding to the content provider server/service provider server; or content provider/service provider identification information, a service processing type corresponding to a service flow provided by the content provider server/service provider server, and a service type corresponding to the content provider server/service provider server.