The utility model provides a gas collection system is produced to soil, get the gas device including gas -collecting device with gas -collecting device is connected. Gas -collecting device includes main discharge to main discharge periphery evenly is equipped with a plurality of row can guarantee that greenhouse gases evenly gets into the air vent of main discharge. Getting the gas device and getting trachea, syringe and three -way valve including the owner, the trachea is got through three - way valve connection owner to the syringe, and the owner gets the trachea and is connected with main discharge. Simple structure, easily operation, convenient to use has reduced research cost, and it is accurate and high -efficient to guarantee that greenhouse gases gathers work, can avoid getting thegas device to crop growth's influence, can carry out the layering paved set to the greenhouse gases that deep soil produced to the shallow layer, improves research precision and efficiency, makes andobserves more representative.