Paintings and colored drawings are one of the external manifestations of Chinese traditional ancient architectural art and play a vital historical role in the art of ancient architecture. They also protected, decorated and illustrated wooden components of buildings. Therefore, paintings and colored drawings are considered to be “the first protective line” for ancient architectural structures. This paper analyzes paintings and colored drawings from Jamyang Rinpoche’s mansion of Kumbum monastery. The art style and features of architectural paintings of Rinpoche’s house are also considered , including the subject and content, ornamentation and pattern, technology and materials of the paintings, as well as local structural features. Then the technology and structural characteristic of architectural paintings from Rinpoche’s mansion of Kumbum tantric Buddhist temple is discussed.