To rapidly and surely perform the supporting action such as the information collection, the instructing communication, the extin-guishment or the like at high ground in safety, in the occation of the fire of a building such as a high-rise building.

A hoist supporting device comprises a rise and fall winch of servo-motor driving, which winds a suspended wire 7 of which an upper end is fixed at the high-ground, and which rises and falls by itself, a suspending device 12 for suspending a wall travel body 1 which comprises a guide wheel 30 having an absorbing plate to be absorbed by the wall face, and rising and setting to the wall face, from a rise and fall winch 9 through a suspending material 10, a tension detector for detecting the tension of the suspending material 10, and a tension controller 67 for controlling the torque of the servo-motor of the rise and fall winch 9, so that the detected tension of the tension detector keeps a specific value, at the absorption of the absorbing plate.