"Art Nouveau" movement originates from France. This architectural style was introduced into Harbin at the beginning of last century. At that time, tsarist Russia constructed Middle East Railway in northeast China and found city by taking Harbin as transportation junction. Compared with the same style in other places of the world, the architectural style of "Art Nouveau" movement in Harbin shows sky-high developmental level no matter on art, technology and durability of time. We should develop new value of the old architectural style.