Indica rice Zhongzheyou 1 and indica hybrid rice cultivar Yongyou 538 were used as materials. Through non-destructive monitoring by rice leaf nitrogen analyzer CCN6001 and the acquisition of NDVI value by unmanned aerial vehicle, precise application of ear fertilizer was realized according to nitrogen content of rice leaf. The improvement of rice taste quality provides new technology for rice quality improvement and efficiency enhancement, and provides a new method for development of intelligent agriculture.