This paper introduces the SOCS (stroke - outline conversion system) for Chinese font data processing. As a post processing system of the CCDS(Chinese character design system), SOCS converts the font data of multi-stroke curved outline, which is produced by CCDS, into the font data of whole -character curved outline. The later is especially suitable for high resolution outputting, for example the Postscript printer.SOCS is not only used for CCDS, but also used as an independent font conversion system.