The present disclosure provides a hypertext transfer protocol (HTTP) scheduling system for content delivery network (CDN), including a central decision-making server, one or more central scheduling servers, and one or more edge scheduling servers. The central decision-making server is configured to generate central decision-making files based on bandwidths and load information of global server clusters. The central scheduling servers are connected to the central decision-making server, the central scheduling servers being configured to execute the central decision-making files, when receiving a client content request, based on a geographic location and a content of the client content request, to select a preferred server cluster and a backup server cluster, and to further return a re-directing address with an address of the preferred server cluster and an address of the backup server cluster to the client. The edge scheduling servers are configured to be in a corresponding edge server cluster.