A content list including contents processable by a designated processing device, among the contents to be processed including a specific content managed with respect to each user, is received by a portable terminal from an ECG server, and a content is selected by a user. Then, a processing request for the selected content is transmitted from the portable terminal to the designated device via the ECG server and a device control server, and unit information of the selected content is acquired by the portable terminal and displayed or reproduced. A user can thereby use the content and the unit information by selecting the content using the portable terminal without depending on the content and the processing device.