Nowadays,　many　kinds　of　decision　support　systems　could　be　chosen　for　decision　making.　In　order　to　deal　with　the　uncertainties　of　problems,　we　proposed　a　lightweight　approach　for　group　decision　support　system　based　on　Struts,　Spring　and　Hibernate　framework.　As　the　core　part　of　the　system,　an　evidential　reasoning　algorithm　using　fuzzy　linguistic,　was　briefly　introduced　and　illustrated　in　detail　with　a　numerical　example.　©　2011　IEEE.