Provided are a knitted fabric seaming method for circular knitting machines and a circular knitting machine system, whereby linked sections can be as fine as other loops. The feed needle (34) is caused to penetrate in the axial direction of the knitting needle (21) and the feed needle (34) and the knitting needle (21) are caused to be continuous in the axial direction. A tip protrusion (34e) of the feed needle (34) is offset to the inside. A feed sinker (49) is moved from the knitting needle (21) to the feed needle (34), in the knitting needle axial direction. The tip protrusion (34e) of the feed needle (34) is inserted into an inside loop (26a) positioned further on the inside of the knitted fabric (27) than a final loop (26) hooked onto the knitting needle (21) and the knitted fabric (27) is moved from the knitting needle (21) to the feed needle (34). The inside loop (26a) that has been moved to the feed needle (34) is linked. The linked loop size is smaller than when the final loop is moved to the feed needle and linked. The linked section can be as fine as other loops and durability and quality of appearance can be improved.