After the roof of a super high-rise building is dismantled, the internal climbing tower crane is installed and transported down. The roof crane is then unloaded with a lifting handle or a small lifting machine, and the remaining parts are unloaded with a construction elevator. ; Internal climbing tower crane, referred to as internal climbing crane, is a tower crane installed in the elevator shaft or stairwell inside the building, which can gradually climb upward as the construction progresses.