Color polyester fiberglass mat for gypsum wall board  is produced from the mixture of glass fiber and polyester fiber by wet lay-out process. Then the mat is further coated with blue color and special binder on the surface. The combination of glass fiber and polyester fiber gives the polyester fiberglass mat combined the flexible features of polyester fiber and stability features of glass fiber and make the surface of the mat be more comfortable for touching. After the special treatment on the surface, this material give the gypsum board excellent features of water proofing, break strength, anti-UV, anti-septic, anti-wrinkle and so on. The color polyester fiberglass mat is an idea material to produce weather board, which can be used on the external wall of the building.