A laser processing system includes a processing machine for performing laser processing on a processing target using a laser beam according to a predetermined processing design; a setting module for preparing a processing recipe including a plurality of set values for testing of processing parameters for the controlling the quality value of a predetermined quality item; a controller for repeatedly performing test processing for the processing target in multiple implementation rounds by driving the processing machine by selectively using any one of the set values for testing as the set value of the processing parameters according to a predetermined order; and an analysis module for analyzing each of results of the test processing and individually measuring the quality value of each of the results of the test processing.