A document edition system includes a microphone to input audio information; an analog to digital converter to convert the audio information into digital information; a memory unit to store the digital audio information into an external storage unit as information to be added to document information; a sound pressure display control unit to display the sound pressure information of the digital audio information to a display device; a digital to analog converter to regenerate the digital audio information from the memory unit into speech; and a device to add the audio information to an arbitrary position of the document information. The sound pressure display control unit can display the speech regenerating position from the digital to analog converter onto a sound pressure display waveform and also includes a device for displaying the sound pressure information by a predetermined pattern width or a tone. There is also provided a device for adding information denomination to the audio information and for storing the resultant audio information into the external storage unit; a device for reading out the audio information from the external storage unit by the information denominations added thereto upon reproduction; and a device for coupling and editing the plurality of readout audio information by their information denominations.