An advanced system for the installation of wire-climbing lifting devices on hollow towers is presented. This system allows two positions easily alternated by the operator of the installation: a resting position, in which the wires (5) are hidden inside the tower (1) and a maintaining position in which wires (5) are safely set up outside the tower (1) to allow a lifting device climbing on them. At the resting position the wire terminals are at ground level so the operators are able to inspect the conditions of them before their use and the safety of the system is improved.