Tianlong Mountain is located in the Luliang Mountains 36 kilometers southwest of Taiyuan City. The main peak is about 1700 meters above sea level. It is mainly composed of Dongfeng, Xifeng, Liuyu and Xianglu Peak. It covers an area of about 1.7 square kilometers. The name of Tianlong Mountain is derived from Yijing. The mountains are undulating and winding, surrounded by grottoes, and there are Zen forests under them. The trees are lush, the streams are long, the air is fresh, and the flowers are everywhere. Since ancient times, it has been a beautiful and pleasant place. Today's Tianlongshan Grottoes Museum, integrating forests, springs, temples and caves, there are more than 100 historical relics such as grottoes, ancient buildings, tomb towers, monuments, sculptures, murals, etc., which are the most abundant cultural relics in the East Wei, Beiqi, Sui and Tang periods in Taiyuan. One of the most complete areas, for the national key cultural relics protection units. Tianlong Mountain is divided into East and West two peaks, 25 caves are distributed, Dongfeng name "Xianyu Mountain", divided into two floors, upper 4 caves, lower 8 caves; Xifeng name "Big Foshan", there are 13 caves. In addition, there are 5 caves dug from the five generations to the Yuanming period on the cliffs of Tianlong Mountain, the mountain, the river, and the cliffs. Therefore, there are a total of 30 caves in Tianlongshan Grottoes, reflecting the characteristics of the cave art of various eras and the development process from the north and south dynasties to the Sui and Tang Dynasties. It is a precious material for studying the art of grottoes in China. It has high academic and artistic value.