A contents delivery system including a network player and plural network servers. When the network player transmits a contents acquisition requirement to one of the network servers, the network server detects a CPU load, and when the CPU load is judged to exceed a CPU load threshold, the network server judges whether contents which the network player requires to acquire were copied to any of network server. When the contents are judged to have been copied, the network server obtains from a HDD not only a contents URI corresponding to the copied contents but also a server ID corresponding to the network server in which the contents were copied and subsequently transmits the contents URI and the server ID to the network player. The network player a contents acquisition requirement to obtain contents, which corresponds to the contents URI, to the network server, which corresponds to the server ID.