This article explained the Emperor Wu’s thoughts among the suburban sacrifices(郊祀) and the fengshan(封禪)activities. The temple of Hou-tu(后土祠)symbolized the center of the world. The temple of Taiyi(太一祠)reflected the Chinese terrain which the north-west is high, and the south-east is low. Besides, The sacrificial altar of Taiyi symbolized the model of the universe. On the other hand, the Emperor Wu built the Kun-Lun Lo(昆侖樓)for going upstairs to the heaven. These three rituals emphasized the concept of the center which is invariable. That’s why the Emperor Wu aspired the immortality through these three rituals.