In this information transmission system, a first user terminal gains access to a business server through a communication network, to transmit a body text of an electronic mail in voice information there. The business server converts the voice information into text information, discriminates the information to be converted into a pictogram, from this information, and further converts it into a pictogram. A user of the first user terminal recognizes a destination from the mail body text and transmits an electronic mail including the pictogram/text mixed body text to, for example, a second user terminal. Also in a TV phone, the voice information is similarly converted into text information and pictogram and combined with an image, and displayed.