On October 12, 2019, The Fifth Perovskite Materials and Devices Young Scholars Forum, hosted by the National Optics Committee of China Optical Society and the State Key Laboratory of Luminescent Materials and Devices of South China University of Technology, was held at South China University of Technology. Domestic young scholars made invitation reports at the conference and discussed the opportunities, challenges and future development directions of perovskite materials and devices from basic theories, novel materials, new methods, and industrialization trends.