The invention discloses a semi-closed space-based air conditioner cooling tower system which comprises a semi-closed space and a plurality of cooling tower groups, wherein the semi-closed space is internally provided with a vertical air shaft which is used for sending air into the semi-closed space; the cooling tower groups are arranged along the inner periphery of the semi-closed space; the cooling tower in each cooling tower group is provided with a fan which is used for pumping the air in the semi-closed space and a cooling tower exhaust cylinder which is used for discharging the hot air; each cooling tower group is provided with a cooling tower exhaust box which is used for uniformly discharging hot air out from the semi-closed space; the cooling tower exhaust cylinders of the cooling tower groups are communicated with the cooling tower exhaust boxes. The semi-closed space-based air conditioner cooling tower system has the advantages of preventing the cooling towers from intake/exhaust short circuit and improving the operation efficiency of the cooling towers.