This invention provides one kind of electro-magnet useing in the tailoring operation, it contains not only stator base, stator coil and the ferrite core, but also attracts gathers examination unit, which contains electronic contact move along with the ferrite core attracts to the stator base gathers the movement to make the relative motion, and when the ferrite core attracts gathers to the statorbase on the pre-calculated position the electronic contact to close by to the servo drive system sds transmits the electro-magnet to be at attracts gathers the condition the signal. This invention also provides one tailoring operation control method, contains following step: (1) the servo drive system sds sends out to the electro-magnet attracts gathers the order; (2) when attracts gathers the examination unit examines the electronic contact closed, to the servo drive system sds transmits the electro-magnet to be at attracts gathers the condition the signal; (3) the servo drive system sds after accepts attracts gathers the examination unit transmission the electro-magnet to be at attracts gathers the condition the signal to complete the following corresponding operation. When uses this kind of structure electro-magnet realizes the tailoring operation, may eliminate the control not the determinism, simultaneously has also avoided the complicated debugging work.