To provide a digital camera system that executes specific processing in a similar way of using a memory with a large capacity for the specific processing for a digital camera even without the provision of the memory of a large capacity and to provide the recording medium used for this system.

The digital camera system is provided with a digital camera 1 and a computer 1000 connecting to the digital camera 1. The computer 1000 is provided with a recording medium HD, which has areas that are accessible by the digital camera 1 to refer to internal data. Moreover, the recording medium HD stores an application program executed by the digital camera.