A hanging device for a wireless transmission media comprising at least one engaging fastener formed on a housing of the wireless transmission media, and a hanging base. The engaging fastener shaped in an āLā configuration is provided with a sliding hook having a positioning recess formed on an upper surface thereof, a connecting portion, and a rib projected from a center portion of an inner surface of the sliding hook adjacent to the connecting portion. The hanging base is provided with at least one engaging recess which includes an inserting portion and a sliding portion, wherein the inserting portion has an elastically positioning piece and a positioning projection while the sliding portion has a slide track, a sliding opening, and a positioning frame. The sliding hook of the engaging fastener is used to insert into the inserting portion of the engaging recess, and elastically bias the elastically positioning piece formed on a bottom portion of the engaging recess so that the rib can be aligned with the sliding opening of the sliding portion, and then inserted into the slide track. When the rib of the engaging fastener is slid to an end along the slide track, the sliding hook is inserted into the positioning frame, and then the positioning recess will engage with the positioning projection so as to stably retain the engaging fastener in the engaging recess.