Three kinds of weathering reference materials namely polyethylene, polycarbonate and poly (ethylene terephthalate) were investigated their characteristics for temperature and ultraviolet radiation using by xenon arc and open flame carbon arc exposur devices with changing their chamber temperature, uv intensity and filters: Activation energy and power number of uv regression analysis were calculated. As the results, polyethylene has large temperature dependency while the effect of uv intensity is rather small. On the contrary, in case of polycarbonate and poly (ethylene terphthalate), the effect of temperatur and uv are quite different fom polyethylene. These materials were also exposed in spectro-uv exposure device. It is recognized that polyethylene has no spector-uv dependency but polycarbonate and poly (ethylene terephthalate) have large spectro-uv dependency. From these experiments, we can select reference materials based on the effect of temperature and uv.