A hanger assembly comprises a hanging bar and two pieces of hanger base, wherein a plurality of bar magnets is disposed in the hanger base in parallel by way of pointing the magnetic poles of same polarity to a common direction and the bar magnets are separated with iron plates; the hanger base is protected with a slot-opened cover having the iron plates protruded slightly over the slots; and magnetic force can be guided and extended to the iron plates to ensure stable attachment of the hanger assembly to the surface of a ferromagnetic article.