An information processing device that communicates with a server on Internet over a local network, having: a session establishing part that establishes a session that enables a communication with said server over said local network; a periodic communicating part that establishes periodic communications at a predetermined time interval with said server to maintain said session; a power controller that stops a power supply to said periodic communicating part if a predetermined condition to enter sleep mode is met; and a substitute requesting part that requests another device installed on said local network to establish the periodic communication with said server that should be established by said periodic communicating part for said periodic communicating part when said power controller enables said information processing device to enter sleep mode.