An image forming system including an image reading apparatus and a printing apparatus connected to the image reading apparatus through a communication line, in which the image reading apparatus includes a font information acquiring unit which acquires font information indicating a type of a font installed on the printing apparatus, a print data generating unit which generates desired print data by using the font information acquired from the font information acquiring unit, and a print data transmitting unit which transmits the print data generated by the print data generating unit to the printing apparatus, and in which the printing apparatus prints out the desired print data on the basis of the print data transmitted from the print data transmitting unit.