A production meat analysis system and method provides means for determining percent or absolute constituents of a production lot of ground meat product immediately following the meat pre-grinding process. During use, the system is located at the output of a production meat pre-grinder such that the ground meat passes over the belt of the weigh conveyor and through the detection field or range of the NIR sensor. During this process, constituent readings for fat, moisture, protein and temperature are recorded for each unit weight pulse. The cumulative weighted average for each constituent is calculated for each unit weight and recorded and displayed on the computer screen as the process continues without stoppage or interruption. Constituent content can thereby be manually or automatically adjusted.