To provide the data of a data format requested by a sewing device by processing information related to the selected sewing device from a storage means and working primary data while judging which data format is to be requested automatically from the information.

A source data receiving part 430 and an attribute set value receiving part 431 at a sewing machine driver part 43 read prepared source data and sewing attribute data out of storage places and store these data in the prescribed storage area of RAM. A sewing machine information identifying part 432 receives the selecting operation of sewing machine type by a user and discriminates the data processing system of sewing machine corresponding to the selected result. Based on the discriminated result of sewing machine type due to the sewing machine information identifying part 432, a sewing data generating part 433 generates and outputs sewing data corresponding to the data received by the source data receiving part 430 and an attribute set value receiving part 431. Further, the sewing data generating part 433 is provided with a block extension processing part 433a and a stitch extension processing part 433b.