The invention relates to a system for carrying out file transmission by using a digital camera device. The digital camera device supports a function of connecting an external memory card. The digitalcamera device comprises the following modules: a setting module for setting the size of a file to be transmitted; a mode selection module for selecting the mode of the file transmission to realize thefile transmission between the digital camera device and the external memory card, wherein, the file transmission mode comprises a file transmission mode from the digital camera device to the externalmemory card or from the external memory card to the digital camera device; a file transmission module for carrying out the file transmission to the file to be transmitted according to the file transmission mode; and a file marking module for marking a transmitted file. In addition, the invention also provides a system for carrying out the file transmission by using the digital camera device.