Abstract: A user registration method and a device for a smart robot. The method comprises: conducting a voice dialogue with a new user to be registered, acquiring a user name of the user from the voice dialogue, and simultaneously collecting biological characteristic information that can uniquely identify the user; wherein the biological characteristic information comprises at least two different types of biological characteristic information, judging whether at least one type of the biological characteristic information satisfies a corresponding preset registration condition, and if yes, using the biological characteristic information that satisfies the preset registration condition as a characteristic template, establishing a correspondence relation between the characteristic template and the user name, and saving the correspondence relation, to complete the user registration.