The handheld multi-parameter gas analyzer utilizes MEMS sensor array technology and incorporates a neural network compensation system, enabling rapid detection of hazardous gas types and concentrations. It features hazard level alerts, personnel fall detection, and a wearable design, catering to various usage scenarios. Additionally, it can be integrated into "mechanical dogs", drones, unmanned boats, and other sealed, confined, and hazardous spaces for hazardous gas detection.