The purpose of this study was try to establish a foundation information of the wild mammal fauna and as a reference for further resources management and public natural education. Since March/2004, a resources investigation of the wild mammals was conducted in Da-Jiou-Shi experimental forest, National Ilan University, which located in Jiou Shi County I-Lan, Taiwan. Update, total of 19 mammal species has been recorded and including from 4 orders and 13 families. Species such as Crocidura attenuate, Crocidura tadae, Melogale moschata subauruantiaca and Niviventer coxingi were found to be highly in aboundance, while species like Paguma larvata taivana, Viverricula indica taivana, Mustela sibirica davidiana and Sus scrofa taivanus are fairly rare - often with only one record. The investigated environment, methods, and the spatial distribution of the wild mammals resource will be describe herein.