A system for retail store shelf stock status monitoring, predicting, and reporting that is capable of monitoring retail store current shelf stock capacity and shelf product freshness at product level, category level, department level, store level, and other product hierarchy levels. It is also capable of intelligently predicting future shelf stock status according to predicted future store sales activities. It uses shelf stock empty index, out-of-stock alert, shelf stock freshness, shelf stock expiration alert, and other shelf stock performance measures to present current shelf status, future shelf status, and past shelf stock performances through interactive store maps and other visual presentation means to optimally deliver retail store shelf stock performance information in real time. The system empowers store clerks, store managers, chain store management, and corporation analysts to monitor, review, and analyze store shelf stock status in real time from anywhere at any time.