The temple was built as the ancestral temple of Tan clan. The Chinese believed that people with the same surname share a common ancestry. An ancestral temple like Tan Si Chong Su provides their clan members a place to honour and respect their ancestors. It is here where the
spirit tablets of deceased clan members are enshrined and venerated. The complex consists of an entrance
hall, a main hall where the
Deities are enshrined, and a rear hall where the ancestral tablets of illustrious Tans are kept. The halls are separated by open
courtyards. The temple also served as the
assembly hall for the Tan clan whose members extended beyond Singapore to
Malaysia. Among some famous Tans associated with the temple was the former
Finance Minister of Malaysia,
Tun Tan Siew Sin, and his father,
Tun Dato' Sir Tan Cheng Lock, founder and first president of the
Malaysian Chinese Association, an important political party in Malaysia. Tan Cheng Lock and Tan Siew Sin were from Malacca as were the fathers of the temple's original
founders. The temple's founders, Tan Kim Ching and Tan Beng Swee, were also associated with Malacca Peranakan clans. Another famous Tan is
Tan Chin Tuan, a retired banker and noted philanthropist and one of the temple's trustees. ==Architecture==