粤剧戏神谭公的真实面貌应是一位出自广东惠州的姓名不详的道人,而且可能最初是一名巫祝。谭公信仰主题可以归纳为祈雨、灭火、保护船只、治病驱疫等。其之所以能从一位地方性神祇变为粤剧戏神,与他具有灭火、保护船只、治病等功能密切相关,同时谭公经常化身为小孩也是他成为粤剧戏神的重要原因。 The true face of Cantonese opera god Tan should be an unknown Taoist from Huizhou, Guangdong, and may have been originally a witch. Tan Gong belief subject can be summarized as praying for rain, fire fighting, protection of vessels, disease and other epidemic. The reason why he can change from a local god to a Cantonese opera god is closely related to his functions such as extinguishing fire, protecting vessels and treating diseases. At the same time, Tan Gong often turns himself into a child and also an important reason why he became the god of opera.