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.