Abstract: An intelligent monitoring system used in potato planters was developed to solve leakage problem caused by empty seed spoons in sowing.This system adopted touch sensors to detect potato pieces in seed spoons in real-time，then judged if it leaded after software logical analysis.Leakage was warned for each line in real time.Leakage rate was calculated，and area of each work space was recorded.Field experiments proved that this system had an excellent performance，and greatly improved efficiency of planters.Its high production efficiency can be capable of the needs of large-scale planting and fill a gap in the potato planting field domestically.