Greenhouse fertilizer applicators are becoming an important upgrading force in modern facility agriculture. Compared with manual fertilization with an error of over 30%, intelligent fertilization equipment can achieve precise fertilizer supply within ±5%, enabling crops to obtain the best nutrients at different growth stages. The utilization rate of water and fertilizer has been significantly improved, with water conservation ranging from 60% to 70% and fertilizer savings from 30% to 50%. Moreover, through automated control, labor costs can be reduced by 50%. Meanwhile, the equipment can also improve soil structure, protect the ecological environment, and will develop in the direction of AI algorithm optimization, sensor fusion and compatibility with green agriculture. It is an important driver of agricultural modernization.