Abstract: Investigations reveal that there were losses and revivals in the Studies of Ancient Civilizations across the world, which was true of the Chinese studies of its ancient civilization. Looking back into the concerned issue since the 19th century, this paper examines and discusses the definition and domain of the Studies Chines of Ancient Civilization, concluding that varied as the definitions and views are, a complete system of the Studies Chines of Ancient Civilization must cover three systems: the knowledge system, the moral system and the value system. Only so can the studies be effective and intimate.