The invention provides an industrial sludge desiccation and aging device, a sludge treating system and a sludge treating method. The industrial sludge desiccation and aging device comprises a dryer shell and a hollow rotation shaft, wherein hollow rotation discs are arranged on the hollow rotation shaft; a sludge inlet and an aging agent inlet are formed above the feeding end of the dryer shell; wedge-shaped blade groups are also arranged on the hollow rotation shaft and are arranged between the hollow rotation discs at intervals; the end of the hollow rotation shaft is connected with an electric vibration exciter which vibrates the hollow rotation shaft at a set frequency; and a water steam outlet and a heat source inlet which is communicated with the interior of the hollow rotation shaft are formed in the dryer shell. The device is relatively low in energy consumption, safe in operation and convenient in operation and maintenance, and can desiccate and age sludge, the sludge is desiccated until water content is smaller than 10 percent, pathogen and bacteria in the sludge are killed, a part of metal ions in the sludge can be combined to form harmless compound, and then the effect of passivating heavy metal ions is achieved.