Hou Tu Nai Nai is the female spirit of or the subordinate to the God of the Earth, or she can be classified as a part of the religion of the Great Mother divinity. Hou Tu Nai Nai is obviously a religion composed with natural conception and gender cognition; besides, it not only spreads over essences of all kinds of divine spirits, but also traces back to the origin of its primitive religious belief. Vietnamese Hou Tu Nai Nai is the divinity influenced by Chinese belief of the Mother Earth. She had been conferred the title as “Hou Tu Nai Nai for obeying the will of the God and nourishing the people” by Lý Thánh Tông and Trần Anh Tông; and, she was also conferred as “Hou Tu Nai Nai for kindness and authority” by Trần Thái Tông and Trần Nhân Tông. Both of them convey symbolic meanings of Mother worship, Earth worship, holy woods, and black spirits in Vietnamese religion of the Mother Earth, its development, and divinity types in miracle tales. Although the agriculture effectiveness of Vietnamese Hou Tu Nai Nai was far less widespread and popularized than Vietnamese local “City gods,” the honorary of Hou Tu Nai Nai by Vietnamese emperors in the ruling class documentary and literature records shows the crucial influence of sinicizing religion. By analyzing miracle tales of Hou Tu Nai Nai, it helps realize the phenomenon of receiving and worshiping Chinese divinities in Vietnam; moreover, through investigating racial characteristics of Vietnamese belief, it presents the track of cultural fusion between Chinese and Vietnamese and the process of its development.