A hanging device with a disposable beverage filter bag includes a filter bag and a hanging ring. The filter bag is made of a filter fabric or filter paper to form a flattened single-opening bag. The filter bag has an opening at an upper end thereof and a pair of hanging slits transversely symmetrically located at middle sections of two sides close to the upper end. The hanging slits are half the width of the opening. The hanging ring is made of a stainless steel wire by winding. The hanging ring has a pair of hanging portions protruding outward from middle sections of two sides of a main frame. When in use, the hanging slits of the filter bag are hanged on the hanging portions of the hanging ring to form a filter stand.