Recently, graphics by graphic terminal widely used in various fields. But, many graphic software package in our country, though has been designed in other countries and necessarily required the use of Korean alphabet in various fields, not followed the requirements. So, this research analyzed the structures of the Korean alphabet, designed the fonts on the use of Korean, developed software module on the use of Korean using the modules of Tektronix Graphic Software module(PLOT-10)and extended the already used graphic software package.