The objective of this research is to find the appropriate number for installing soil moisture measurement devices, using the minimum number of sensors while ensuring coverage of the entire cultivation area. This is achieved by applying a spatial modeling approach in conjunction with a wireless sensor network. To make soil moisture measurement efficient and reduce the cost of installing excessive amounts of soil moisture measurement equipment. Experimental results from collecting soil moisture values. In the experimental area of ??4 square meters, where soil moisture sensors were installed at all 81 points, it was found that the overall soil moisture value had the lowest soil moisture value of 56.26% and the highest soil moisture value of 59.96%, which from the values It was found that the soil moisture values ??in the experimental area were slightly different. You can choose to install only 1 soil moisture detector in any position in an area of ??4 square meters, which is sufficient for use. This is because the measured soil moisture values ??are not much different and are within a single moisture level range.