  Human-computer interaction (HCI) emerged with the birth of the computer and
has been upgraded through decades of development. Metaverse has attracted a lot
of interest with its immersive experience, and HCI is the entrance to the
Metaverse for people. It is predictable that HCI will determine the immersion
of the Metaverse. However, the technologies of HCI in Metaverse are not mature
enough. There are many issues that we should address for HCI in the Metaverse.
To this end, the purpose of this paper is to provide a systematic literature
review on the key technologies and applications of HCI in the Metaverse. This
paper is a comprehensive survey of HCI for the Metaverse, focusing on current
technology, future directions, and challenges. First, we provide a brief
overview of HCI in the Metaverse and their mutually exclusive relationships.
Then, we summarize the evolution of HCI and its future characteristics in the
Metaverse. Next, we envision and present the key technologies involved in HCI
in the Metaverse. We also review recent case studies of HCI in the Metaverse.
Finally, we highlight several challenges and future issues in this promising
area.

Human-Computer Interaction;Emerging Technologies