Abstract: In order to deal with the ethical problems from technology, scholars at home and abroad have put forward a variety of methods for practicing ethics . As the sum of a series of cutting-edge technologies that have not been put into production and are still in the R&D stage, emerging technologies have two characteristics: uncertainty and great influence. Therefore, the ethical problems brought by emerging technologies also have their unique characteristics compared with general technologies, and thus produce corresponding dilemma in the process of practicing ethics. Its main characteristics are that the consequences are more difficult to predict, the scope and degree are larger, more complex and diverse, and it is more difficult to be understood by the public. In order to deal with the dilemma faced by Practical Ethics of Emerging Technology, we should turn the research object from the emerging technology to the emerging technology practice process. Restore the problem to the practice itself, and make up for the lack of empirical experience materials through the understanding of the practice field and the action logic of the practice subject. Practical Ethics of Emerging Technology starts from the four practice fields of R&D, production, use and governance respectively. It aims to match ethical principles and theoretical methods in each practice fields. Mediate R&D design, optimize production and use process, and seek solutions in technical governance.