For several decades, China has been seeing a great transformation. A variety of groups, trends of thought and religions have tried to participate into the construction of an ideal society and culture. This article aims at shedding light on the possible contribution of Christianity and Sino-Christian Theology to Chinese social and cultural construction from the perspective of the functions of civil religion. Based on analyzing Robert Bellah's related writings, the author sorts out three kinds of priestly function and three kinds of prophetic function of civil religion. Drawing on existing sources of Sino-Christian Theology, some observations on its context in Mainland China and inspirations from Bellah's reflection on civil religion, the author argues that the functions of civil religion are desirable in China, but might be performed by alternative social reality. If Sino-Christian Theology tries to play a role in the public sphere, the function which it can make itself distinguished might be to enhance the social solidarity and harmony based on proclaiming the Christian theology of reconciliation and agape. This is certainly a kind of priestly function. Any attempt to perform its prophetic function might encounter irresistible rebound from the Leviathan. This is the author's predicament based on the description of the reality, without concern with "what it ought to be".