To step always a selvage bobbin on the let-off side easy to perform repair work when a selvage yarn breaks in a planetary selvage apparatus of such a configuration that leno selvage texture is formed after a pair of selvage bobbins is revolved by one revolution while the bobbins are rotating during the time in which the main shaft of a loom is revolved two turns and a break of selvage yarn on the selvage bobbin is detected in a predetermined revolution phase to send out a selvage yearn breakage signal.

This method and system therefor send out a command signal for stopping a loom at a predetermined time preset with a delay from a crank angle at end breakage detection in a crank cycle next to a selvage detection crank angle after an end breakage signal is sent out in a planetary selvage apparatus of such a configuration that leno selvage texture is formed after a pair of selvage bobbins is revolved by one revolution while the bobbins are rotating during the time in which the main shaft of a loom is revolved two turns and a break of selvage yarn on the selvage bobbin is detected in a predetermined revolution phase to send out a selvage yearn breakage signal.