MR-ACT gas remote sensing imaging early warning system can measure more than 400 kinds of gases with a monitoring diameter of more than 10 kilometers. It is a scanning gas infrared remote sensing telemetry imaging system based on passive Fourier transform infrared spectroscopy technology to achieve target gas cloud Long-distance automatic detection and chemical imaging of the group, with early warning function. The system can be used in chemical park gas leakage monitoring, hazardous chemical emergency monitoring, major event security, fire protection, forest and grassland fires and other fields.