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In view of the chemical enterprise TVOC characteristics, which are including more emission points, wet environment, difficult wiring, and even explosion-proof requirements, a TVOC real-time intelligent monitoring system is designed, which uses STM32 processor as the core to realize the environment gas extraction, moisture separation, TVOC sensor data acquisition and self-correcting control, uses wireless transmission technology to achieve the data gathered in each plant in order to realize remote monitoring and reduce the costs of flow, and uses GPRS technology to realize the docking with a plurality of center platform. After long field running, the detection error is less than 0.3% and the data receiving rate is more than 99.96%. The system is stable and plays an important role in atmospheric monitoring.