A cradle apparatus for a digital camera with a control program preliminarily installed, including a communicating device in which an information signal is sent and received between an information processing apparatus and the digital camera, an output by which video signal is output, a connector onto which the digital camera is detachably connected, a charging detector to detect a voltage level of battery in the digital camera, and a version detector to detect the control program for the digital camera being sent and received as the information signal between the digital camera and the information processing apparatus by the communicating device to re-write the control program.