1. An image transmitting apparatus for transmitting a color image or a monochromatic image comprising: a transmission memory for storing color image data transmitted; transmission means for transmitting the color image data stored in said transmission memory in a color transmission mode or in a monochromatic transmission mode; a display memory separated from said transmission memory for storing color image data corresponding to the color image data stored in said transmission memory; a monitor for visually displaying the color image data stored in said display memory, as a color image or a monochrome image, before said transmission means transmits the correspondent image data stored in said transmission memory to a network; and process means for processing image data to be stored in said display memory according to the transmission mode of said transmission means.