As the awareness of environment consciousness, European Union passed the The Waste Electrical and Electronic Equipment Directive(WEEE) Directive on October, 2002. According to this directive, private households will be able to return their WEEE to collection facilities free of charge and producers(manufacturers, sellers, distributors) will be responsible for financing these facilities from August, 2005. After that, EU passed The Restriction of Hazardous Substances in Electrical and Electronic Equipment (RoHS) Directive into law. It affects manufacturers, sellers, distributors and recyclers of electrical and electronic equipment containing lead, cadmium, mercury, hexavalent chrome, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE). After 2006 the use of these materials will be banned in new products sold in Europe. The execution of these two directives will force electronic industry change the attitude that place importance on quality specifications to increase some environmental specifications. Some IC assemblying companys started to implement green supply chain and establish green purchasing specifications to follow the market trend. Vender selection is very important portion in the supply chain management. Base on the green purchasing request, the criterions also need to be revised. This research is trying to establish the green vender selection criterions and find out the weighted point of each criterions by Analytical Hierarchy Process(AHP) method. The purpose of this research is to set up a green vender rating system that can be applied to the IC assembly industry.