The strongly coupled system between optical cavity and atoms is a basic system in the research of quantum physics, which not only has important physical significance, but also provides an ideal system for the generation of key technologies and the research of key devices of quantum information, quantum computation and quantum precision measurement. The experiment of the strongly coupled interaction between cavity and atom has been developed since 1990s. After years of research, great progress has been made in the strong coupling between single atom and optical cavity and the coupling between atomic ensemble and optical cavity. With the progress of quantum manipulation technology of multi-atom array, the strongly coupled system of controllable multi-atom array and optical microcavity has become an important research direction of cavity quantum electrodynamics in recent years. However, the strong coupling between the deterministic controllable multi-atom array and the cavity is still faced with great technical challenges at present, and the number of controllable atoms remains at two. The main experimental progress and corresponding experimental schemes of the strongly coupled cavity quantum electrodynamics system in the optical frequency region in recent years are briefly reviewed, and the future development is prospected.