Environmental safety has increasingly become the focus. However, hazardous chemicals enterprises are of primary concern and focus. From this point, hazardous chemicals enterprises are taken as the main object of studying on enterprise environmental risk. According to application requirements, from a technical perspective, it is studied on the application functions, framework and the logical model of the database using GIS and REST technology. GIS application system of environmental risk for hazardous chemicals is established to provide environmental risk management and emergency management with technical tools. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Conference ESIAT2011 Organization Committee.