Abstract: An autonomously controlling system for water efficient infiltrating irrigation is introduced. The constitution and a ssembling proceeding of the system as well as its supporting software and hardware, and the function indicators are detailed in the paper. The system is coming with easy design, low cost and high reliability. It can autonomously monitor the upper limit and the lower limit of soil moisture in sandy land and water table in percolating pot. Based on the needed information the system will supply water autonomously, which can reduce labor intensity considerably. The autonomously controlling system is favorable for the modernization management of agriculture by appling computer technology, which is worthy of popularization in water efficient agriculture.

Key words: Water efficient infiltrating irrigation, Autonomously control, The upper and lower limits of suitable soil moisture, The upper and lower limits of water table in pot