The invention discloses an ultra-low concentration atmosphere NO2 high-resolution electrochemical wireless telemetering system, and belongs to the field of atmospheric pollution monitoring. The system comprises an atmospheric sampling module, a concentration sensing module, a data processing module and an upper computer monitoring module; the atmospheric sampling module comprises a filter membrane, a drying agent, a rotor flow meter and an air pump; the concentration sensing module comprises an air chamber, a NO2 electrochemical sensor, a low noise signal conditioning circuit and a constant temperature control device; the data processing module comprises a 16-bit analog-digital converter ADS1115, a DSP main control unit, a power supply and a LoRa wireless data transmission module A; the upper computer monitoring module comprises a L0Ra wireless data transmission module B and a LabVIEW monitoring center. According to the constructed low-cost portable atmosphere NO2 telemetering system, high-precision detection of ultra-low concentration NO2 low to 0.26 ppb can be achieved, and excellent stability and reliability are achieved, constraint of wired data transmission is eliminated, the leading role of optical detection equipment can be dispersed orderly, and the prospect is expected.