Promote the sustainable development of agriculture and produce high-quality and high-yield agricultural products. It is the fundamental goal of agricultural production, no matter in the feudal society with backward science and technology. Still in today’s advanced science and technology. Relevant departments and ordinary people have made great efforts. Farmer producers through rational fertilization. Pursue high-yield and high-quality agricultural products. Efforts should be made to improve the quality and yield of agricultural products in terms of rational irrigation, pest control, soil testing, and variety cultivation. Among them, soil moisture detection is one of the most important tasks in modern agricultural production. Soil moisture mainly comes from atmospheric precipitation and irrigation water. In addition, there are condensation of water vapor near the ground, rising groundwater levels, and moisture in soil minerals. Below, let us understand the importance of soil water detector.