Remote image-pickup system, camera device, and card substrate

A remote image-pickup system includes a camera device including an image-pickup unit for capturing an image of a subject and generating picture signals and a card slot; and a plurality of types of card substrates which are selectively inserted into the card slot and which convert the format of the picture signals so as to output the converted signals to an external device. By inserting different card substrates into the card slot, a plurality of formats of picture signals can be output from the camera device. Accordingly, the format of the picture signals output from the camera device can be flexibly expanded. Further, since many circuits for converting the picture signals need not be incorporated into the camera device, an increase in the size and price of the camera device can be prevented.