PURPOSE: To facilitate input of embroidering data for knitted fabric products and enable these stretchable products to be embroidered exactly.

CONSTITUTION: A knitting data image 2 is shown on the monitor as the monitor image 4, in which the aspect ratio of the loop is corrected and the embroidering data are inputted by referring this image. Further, a plurality of positioning points 11-13 are designated to express the positioning points on the garment 24 as tucks and eyelets. The embroidering data image and the positioning points are synthesized on the contour of the monitor image and the hard copy 20 of the full scale is printed out and set on a embroidering frame, further a laser marker is set to a positioning point. Then, the garment 24 is set to the embroidering frame and is adjusted by expanding and shrinking the garment until the positioning point fits to the laser marker.