Abstract: This invention relates to a digital notebook which comprises a pen, a USB storage unit and paper. The pen is provided with a wireless transmission module. The USB storage unit is provided with a wireless reception module, a processing module and a data storage module, and the USB storage unit is fixed on the paper. When a writing action is conducted by the pen on the paper, the wireless transmission module of the pen continuously transmits signals which are then received by the wireless reception module of the USB storage unit. The signals are stored in the data storage module after they are operationally processed by the processing module. After the digital notebook is connected to a personal computer through the USB port on the USB storage unit, the data written on the paper can be displayed on the personal computer.