A system for monitoring the condition of a travelling grate machine, in particular a pelletizing or sintering machine, said travelling grate machine comprising a plurality of pallet cars comprising a car body with wheels, side walls and a perforate floor with a plurality of grate bars, the system comprising: identification means for univocally identifying each pallet car; sensor means for collecting a plurality of condition indicating parameters, wherein said sensor means comprises: sensor means for collecting parameters indicative of the condition of the wheels of the pallet car; sensor means for collecting parameters indicative of the condition of the grate bars of the pallet car; and sensor means for collecting parameters indicative of the condition of the car body and/or side walls of the pallet car; processor means for attributing the collected condition indicating parameters to an individual pallet car; storage means for storing the collected condition indicating parameters for each pallet car in a database; evaluation means for evaluating the condition of the travelling grate machine, wherein said evaluation means is adapted to: compare the different condition indicating parameters collected by the different sensor means of each pallet car to reference parameters and/or to previously collected condition indicating parameters of that same pallet car; identify the faults in each pallet car based on this comparison; classifiy each pallet car according to its need of maintenance based on the severity of different identified faults; and determine the pallet car in most need of maintenance based on this classification. identification means for univocally identifying each pallet car; sensor means for collecting a plurality of condition indicating parameters, wherein said sensor means comprises: sensor means for collecting parameters indicative of the condition of the wheels of the pallet car; sensor means for collecting parameters indicative of the condition of the grate bars of the pallet car; and sensor means for collecting parameters indicative of the condition of the car body and/or side walls of the pallet car; sensor means for collecting parameters indicative of the condition of the wheels of the pallet car; sensor means for collecting parameters indicative of the condition of the grate bars of the pallet car; and sensor means for collecting parameters indicative of the condition of the car body and/or side walls of the pallet car; processor means for attributing the collected condition indicating parameters to an individual pallet car; storage means for storing the collected condition indicating parameters for each pallet car in a database; evaluation means for evaluating the condition of the travelling grate machine, wherein said evaluation means is adapted to: compare the different condition indicating parameters collected by the different sensor means of each pallet car to reference parameters and/or to previously collected condition indicating parameters of that same pallet car; identify the faults in each pallet car based on this comparison; classifiy each pallet car according to its need of maintenance based on the severity of different identified faults; and determine the pallet car in most need of maintenance based on this classification. compare the different condition indicating parameters collected by the different sensor means of each pallet car to reference parameters and/or to previously collected condition indicating parameters of that same pallet car; identify the faults in each pallet car based on this comparison; classifiy each pallet car according to its need of maintenance based on the severity of different identified faults; and determine the pallet car in most need of maintenance based on this classification.