An information processing system comprising: a main system including a main device having a first communication section; a sub-system including a sub-device having a second communication section; and an input interface device that has a third communication section capable of communicating with the first communication section or the second communication section and transmits an input from a user to the main device or the sub-device, the main device and the sub-device being communicable, the main system holding content data and having a first display, the sub-system or the input interface device having a second display, characterized in that, the main system, the sub-system and the input interface device communicate with each other wirelessly by the Bluetooth protocol, when the sub-system operates as a master in the Bluetooth protocol, the main system and the input interface device operate as a slave of the sub-system in the Bluetooth protocol and when the user selects content data to be used and a status of the content data is such that the content data requires authentication through communications between the main system and a network server over a communications network, execute an activation processing for authentication and upon checking that the activation processing has been executed, the sub-system initiates function switch processing in which the main system operates as a master in the Bluetooth protocol and both the sub-system and the input interface device operate as slaves of the master system in the Bluetooth protocol; wherein the content data requires authentication only when the content data has been downloaded as a speculative download and has not yet been activated. a main system including a main device having a first communication section; a sub-system including a sub-device having a second communication section; and an input interface device that has a third communication section capable of communicating with the first communication section or the second communication section and transmits an input from a user to the main device or the sub-device, the main device and the sub-device being communicable, the main system holding content data and having a first display, the sub-system or the input interface device having a second display, characterized in that, the main system, the sub-system and the input interface device communicate with each other wirelessly by the Bluetooth protocol, when the sub-system operates as a master in the Bluetooth protocol, the main system and the input interface device operate as a slave of the sub-system in the Bluetooth protocol and when the user selects content data to be used and a status of the content data is such that the content data requires authentication through communications between the main system and a network server over a communications network, execute an activation processing for authentication and upon checking that the activation processing has been executed, the sub-system initiates function switch processing in which the main system operates as a master in the Bluetooth protocol and both the sub-system and the input interface device operate as slaves of the master system in the Bluetooth protocol; wherein the content data requires authentication only when the content data has been downloaded as a speculative download and has not yet been activated.