The present invention relates to a Akkermansia muciniphila SNUG-61027 strain (accession number KCTC 13530BP) and a use thereof. Specifically provided are: a composition for appetite control or prevention, improvement, alleviation or treatment of metabolic diseases, containing, as an active ingredient, the strain, a culture liquid thereof and the like, or a B2UM07 protein isolated therefrom; a use of the composition for appetite control or prevention, improvement, alleviation and treatment of metabolic diseases; and a method for appetite control or prevention, improvement, alleviation and treatment of metabolic diseases by using the composition. Therefore, the present invention exhibits effects of weight loss and glucose homeostasis control, from among anti-obesity effects, and influence on brown fat and secretion of an appetite control hormone secretion.
