For a long time, games have been placed on the opposite side of morality withoutdiscrimination, and this generalized overlook tends to obscure the value of serious games such as healthgames and educational games. In order to break this stereotype, this paper borrows the idea of “MoralTechnology ” from the Dutch philosopher of technology Wiebeke to rethink serious games (takingthe health game Fitness Ring Adventure as an example).The study found that Fitness Ring Adventure isethical in both the external narrative and the endogenous embodied practice. In the content dimension,the narrative of Fitness Ring Adventure functions as an exhibition of health concepts; in the operationdimension, the high-energy-consumption operation design of Fitness Ring Adventure a priori definesthe length of use and practice of players.