Terminal data sharing method and system, input device and automobile data recorder terminal

The invention provides a terminal data sharing method and system. A user can send a control instruction to an automobile data recorder terminal through an input device, so that the automobile data recorder terminal can generate image data in a real-time manner and notify a third party terminal to obtain the image data in the real-time manner and share the image data through a remote interface, accordingly, the user can share the image data grabbed and generated by the automobile data recorder terminal in the real-time manner, and thus the sharing instantaneity is better. Since the input device is only simply operated to achieve real-time share (for example, one-key share), and the input device is in wireless connection with the automobile data recorder terminal through Bluetooth, so that the convenience and security are effectively guaranteed. The invention further provides an input device and an automobile data recorder terminal.