In order to develop the suitable soil pollution control standards, relevant information and regulations have been collected and analyzed. The risk based assessment has been taken into consideration while propose the soil pollution control standards amendment. The framework of making soil pollution control standards has been suggested.The addition of soil control contaminants evaluation and screening method has been developed. The Soil dioxin control standard amendment has also been suggested.Soil quality and property of 26 soil profiles in Hsinchu, Taichung, Yunlin, Kaohsiung and Pingtung are investigated. The soil quality index of heavy metals mobility in soil is developed via expert opinions with minimum data set method and principal component analysis with minimum data set method.To develop soil information sharing platform, this project integrate relevant soil quality information and built the time-spatial analysis, soil quality indicator and statistical analysis function on the soil quality database system.In order to establish baseline soil concentrations of dioxin in Taiwan, this project continue the past dioxin survey and completed 370 soil sample collections and analysis for the baseline survey and designated area investigation. The soil concentration from the baseline survey is between 0.389~66.1ng I-TEQ/kg. Five areas of the designated area investigation have higher concentration and should be concern continuously. The baseline survey investigation shows that the environmental impact is low in these areas.