Abstract: A fastening device is introduced. The fastening device includes a seat body, a first fastening body and a second fastening body. The seat body may be disposed on a first object; the first fastening body is movably provided in the seat body, the first fastening body cooperates with the seat body for fastening and unfastening, so that the first fastening body couples with or separates from a second object; the second fastening body is movably provided in the first fastening body, the second fastening body cooperates with the first fastening body for fastening and unfastening, so that the second fastening body couples with or separates from a third object.

Abstract: A fastener operating structure includes a holding base and a fastening-connecting unit. The holding base is disposed at a first object. The fastening-connecting unit is movably disposed at the holding base. The fastening-connecting unit is fastened to a second object. Consequently, the holding base is disposed at the first object, and the fastening-connecting unit is coupled to or removed from the second object, so as to couple together and separate the first and second objects repeatedly and quickly.

Abstract: A fastener operating structure includes a holding base and a fastening-connecting unit. The holding base is disposed at a first object. The fastening-connecting unit is movably disposed at the holding base. The fastening-connecting unit is fastened to a second object. Consequently, the holding base is disposed at the first object, and the fastening-connecting unit is coupled to or removed from the second object, so as to couple together and separate the first and second objects repeatedly and quickly.