Several Chinese traditional astronomical instruments are shown in the yard of Beijing Ancient Observatory---the Armillary Sphere made in Ming Dynasty(1:1,Imitation), the Abridged Armilla in Yuan Dynasty(1:1,Imitation), the Abridged Armilla in Yuan Dynasty(1:3,Imitation),the Square Table in Yuan Dynasty(1:1,Imitation). Sundial and Gnomon are shown in the back yard. They are well-known throughout the world for their technical work, beautiful crafts and well-protection.