Through an in-depth analysis of the root causes and effective solution models for “responsibility gap” in the metaverse world， the connotation and types of responsibility gap are reinterpreted. From an ethical perspective， while discussing the strengths and limitations of “relationship method” and “interpretive method”， it introduces the “society-human-machine” relationship model that assigns relational responsibility to non-human entities， resolving the issue of autonomous systems being unable to bear moral responsibilities. Additionally， by using the interpretive method， it presents the “history-fiction” narrative model， clearly defining the narrative responsibility of humans for the actions and consequences of autonomous systems. Comparative studies have shown that these two methods are complementary， including the complementarity of responsibility allocation factors， the complementarity of human and non-human entity responsibilities， and the complementarity of legal， moral， democratic， and active responsibilities. Therefore， adopting a collaborative model of the relationship method and the interpretive method to bridge the responsibility gap is helpful to establish a responsible and sustainable metaverse world system.
