The east and west sides in front of the lobby are the places where the Meng Mansion manages the offices such as worship fields, general affairs, ritual students, music students, secretary, deacons, etc. There are drum music towers on the left and right in front of the lobby for music performances. In an independent small courtyard on the east side of the lobby, there is a three-column hard-mounted building, which is the Meng clan's ancestral hall, known as the "Five Dynasties Ancestral Hall". Inside the temple are placed the wooden tablets of five generations of Meng's hereditary Doctors of the Five Classics of the Hanlin Academy, and the upper tablets were moved to the "Zhuzhu Temple" of Meng Temple.
On the west side of the lobby, there is a unique ruler-shaped building called "Jianshan Hall", which was the place where the descendants of the Meng family received and entertained guests at that time. Opposite to the Jianshan Hall, outside the Moon Gate, stands an exquisite Taihu stone, which is engraved with handwritten poems by Ruan Yuan, an epigrapher from the Qing Dynasty, and Kong Jishu, the calligrapher and owner of the "Yuhong Tower", a descendant of Confucius.