The invention discloses a soilless culture method which comprises the following steps: soaking a seed generating mucus after being soaked in water at 15 DEG C-45 DEG C for more than 20 minutes so as to generate the mucus; coating the seed generating the mucus after being soaked in a groove or a pit arranged on the red argil exposed surface of a soilless culture pot made of red argil and bonding the seed in the groove or the pit by the generated mucus; and filling water or nutrient solution or at least adding water or nutrient solution which is two thirds of the volume of the soilless culture pot into the soilless culture pot. The soilless culture method can conveniently, rapidly and directly culture the seed by the soilless culture pot filled with the water or the nutrient solution.