This paper deals with Buddhist Hermeneutics and its contribution to world ethics. First of all, it investigates explicates from the angle of hermeneutical the transontology in the experiences of Zen Buddhist seeing one’s nature, treats the essential approaches and features of Zen ethics, and accordingly specifies how Buddhism constructs world ethics. This article starts with a discourse Hans Kung’s conception of world ethics and its frame0work. Then it discusses the experiences of nature-beholding in the Buddhism, according to the development of the depth model in Zen Buddhism. It uses mahayaha ontological interpretation as a frame-ontology for a significant interpretation of Zen Buddhism. The objects of interpretation in clued: Tathagata mediation of lankavatara-sutra, the consciousness storage of Ttathagatagarbha, the three moments of ontological Hermeneutics of the parable, “pointing a finger at eh moon.” Based upon the notions mentioned above, this paper also expounds the ethics of Zen Buddhism and specifies the possible contributions of Buddhism to a world ethics.