This videoconference system includes plural user's user PCs, a digital camera that is connected to each user PC through a cradle and can take a moving image, a server for a videoconference, and the Internet that connects these user PCs and the server for a videoconference. Each user PC has a program for videoconference for performing a videoconference, and when detecting that the digital camera is mounted on the cradle and is connected to the user PC duplex-communicably, the user PC makes a videoconference possible by automatically booting the above-described program for videoconference, and making moving images, taken with digital cameras of both users who are mutually communication, displayed on display devices of both user PCs.