Fast and efficient access to the information of farmland is the basis of precision agriculture. Soil is an important part of agriculture for crop growth. Soil electrical conductivity is used for measuring the capability of soil conduct current. In addition to soil texture, soil electrical conductivity is also capable of reflecting the properties of moisture content, salinity, organic content, etc. Soil spectral data can be used for analyzing soil moisture, nutrient content, etc., without sampling or stirring the soil. The correction of soil electrical conductivity and spectral data can improve the accuracy of the system. Based on the embedded technology, a soil electrical conductivity and soil spectral reflectance integrated detection system was developed. Based on the improved “current-voltage four terminal” principle, the soil electrical conductivity system used subsoiling plow as electrode sensor. It could conduct measurement and loose soil as well. STS-NIR miniature spectrometers were used for acquiring the real-time spectral reflectance data. GPS information was acquired and saved synchronously with soil electrical conductivity data and spectral reflectance data for soil characteristics distribution. The system can handle a variety of data real-timely, and display, save data synchronously, and it has good application prospects.