A method for creating a garment comprises steps of: creating a garment on a garment window; adding a first panel to the garment; adding a second panel to the garment; enclosing a plurality body parts of the human body with a plurality of panel positioning boxes; positioning selected panels on faces of the panel positioning boxes disposed around the human body three-dimensionally in order to facilitate matching of corresponding seam lines; defining a seam between the two selected panels which belong to the garment; deleting a selected panel from the garment; saving the garment into a garment file; and opening the garment by reading in the garment file stored in a storing device.