Abstract: Direct Air Carbon Capture (DAC) technology can selectively capture CO₂ from the air, which is conducive to solving the geographical mismatch between capture and utilization. Current research on DAC is mainly focused on the investigation of capture performance at laboratory scale, and there is no full-flow process system. The CO₂ capture and desorption performance of three types of amine solutions (namely primary amine, secondary amine, and tertiary amine) was investigated, and the product changes of the absorber during the capture and desorption processes were qualitatively detected by ¹³C nuclear magnetic resonance (NMR) spectroscopy. The influences of operating conditions such as filler type, filler height, and liquid/gas ratio on the capture process performance were also investigated. A full-process system for capture and desorption was constructed, and an integrated mobile airborne carbon capture equipment with a hundred-ton scale was developed. A mobile airborne carbon capture device was developed. The results show that primary amines have higher capture performance due to the higher number of ratio firstly and then stays stable, and the trapping efficiency with the liquid/gas ratio of 100 mL/L reaches 96%. In binding sites on the N atom, which can react with CO₂ to form carbamate faster, and among the primary amines, 1-amino-2-propanol (1A2P) shows the highest capture desorption performance. The metal orifice plate corrugated regular packing with wall flow ring has better gas-liquid mass transfer performance and the trapping efficiency increases gradually with the increase of packing height, and the trapping performance increases with the liquid/gas the developed 100 upgraded mobile equipment, the operation test results show that the CO₂ concentration at the outlet of the absorption tower is close to 0, and the CO₂ concentration at the outlet of the desorption tower can be flexibly adjusted with the size of the carrier gas flow, which demonstrates the good trapping efficiency and operability. The full-flow DAC system constructed in the study achieves the transformation from laboratory research to miniaturized application technology, enriches the application scenarios of direct air carbon capture, and provides a reference for subsequent scale-up development.