Abstract: The intelligent micro-irrigation system based on internet of things technology, an efficient way to agriculture sustainable development in arid area, can realize precision irrigation. With internet of things technique and according to the exact demands of irrigation decision-making and management, the cotton intelligent micro-irrigation system was designed and implemented. This system was applied in the cotton demonstration zone with the technology of drip irrigation under plastic film in Kuala, Xinjiang. The results indicated that the system can solve the difficulties of the layout of soil moisture monitoring points, high price of key hardware products. The intelligent micro-irrigation system cost reduced by 44.8% compared to the foreign similar products, and the system increased WUE by 22.6% compared to the traditional irrigation method.