The invention provides an automatic prefabricated light T-
beam system and method. The 
system and the method are characterized in that a mixing 
station, a reinforcement cage binding area, a prefabricated beam pouring area, a high-temperature steam curing area, a tension finishing area, a lifting beam transverse moving area and a T-beam 
storage area are arranged; the mixing 
station is arranged on the outer side of the prefabricated beam pouring area in the width direction, and pouring raw materials are conveyed to a distributing 
machine above the prefabricated beam pouring area by that a torpedotank passes through a conveying rail; the reinforcement cage binding area is arranged on the front side of the prefabricated beam pouring area in the length direction; a transverse moving trolley isarranged between the longitudinal movement of a 
steel bar binding area and lifting beam transverse moving area; the high-temperature steam curing area and the tension finishing area are sequentially arranged at the rear side in the length direction of the prefabricated beam pouring area; and the lifting beam transverse moving area is arranged on one side in the width direction of the tension finishing area, and the transverse moving and lifting of a prefabricated light 
T beam to a 
T beam storage area is realized through transverse 
lifting equipment. According to the 
system and method, reasonable 
processing layout and flow optimization of the whole 
T beam can be realized, through the operation of circular 
processing, the production efficiency is greatly improved, and the design is reasonable.