Hydroponic System of greenhouse applies the hydroponics, which refers to the means of cultivation that is equipped with the base materials, not natural soil, when plants are in seed-breeding period and that is fixed with nutrient solutions for irrigation after they are settled, preventing the diseases due to the soil frequently used and the physiological barriers because of the salt accumulation of it and meeting the needs of plants with minerals, water, air and other conditions. The base materials can be recycled, and the hydroponics is characterized with water-saving, fertilizer-saving, labor-saving as well as great harvest and superior quality, etc