The invention discloses a six-support wall-mounted type tower crane space supporting system comprising a first supporting main beam, a second supporting main beam, a first main beam inclined support, a second main beam inclined support, a third main beam inclined support, a fourth main beam inclined support, a first connection rod and a second connection rod. At least one of the first main beam inclined support and the second main beam inclined support is not within the XOZ plane or the plane parallel to the XOZ plane. The third main beam inclined support and the fourth main beam inclined support are not within the XOY plane or the plane parallel to the XOY plane. The space multi-inclined-support form is adopted for the structure of the system, the bearing reaction of the supporting system can be shared, the support reaction of each single support is reduced, and the core tube wall reinforcement difficulty under the effect of the tower crane construction load is lowered.