Abstract: The present disclosure is related to a multi-purpose aluminum folding ladder having a detachable stand-on board and a pair of supporting handrails mounted thereto when used as a stepladder, and more particular to a foldable ladder which can be converted into ladders of different forms such as, a stepladder, a stretched climbing ladder, and also into work stations, and tables etc., and can further be assembled into a variety of exercising apparatuses with the assistance of a number of accessory parts on which people can do various kinds of exercise such as rowing, weight-pulling, chest-expanding, arm and leg strengthening; and can also be transformed into a chair for relaxation purpose. The multipurpose folding ladder is characterized by its practicality and readiness in use.