A support system for a laser beam machine is provided which includes an inferred value production unit which produces an inferred value for each of a plurality of processing condition parameters indicative of conditions under which laser processing is performed, by use of an artificial intelligence function, and a display unit which displays the inferred value produced by the inferred value production unit. The support system further includes an input unit which allows an operator to enter a plurality of evaluation parameters that represent results of evaluation on a current processing state. The inferred value production unit includes a processing condition parameter selecting portion for selecting one of the processing condition parameters which is most effective to modify the current processing state, according to the evaluation parameters entered through the input unit, and an inferred value calculating portion for calculating the inferred value based on the output of the processing condition parameter selecting portion, and the evaluation parameters entered through the input unit.