Invited expert: Professor Ke Xizheng (Xi'an University of Technology), Professor Wang Tianshu (Changchun University of Science and Technology), Professor Wang Huiqin (Wang Huiqin) With the emergence and rapid development of internet of things, big data and artificial intelligence, human society is going to enter the age of intelligence. In the age of intelligence, the volume of subscriber digital terminal and a variety of business data will increase rapidly, which puts forward new requirements on the capacity, velocity and delay of communication technology. Optical wireless communication (OWC) combines the advantages of optical fiber communication and traditional wireless communications such as microwave communication. It has the advantages of large-capacity transmission, no frequency license, low cost, convenient installation, safe and confidential communication, etc. It has become an emerging broadband wireless access method and is a good way to approach the last one-mile problem in communications. The Special Issue of Optical Wireless Communication publishes 15 papers in Opto-electronic Engineering. It mainly introduces the development and future of OWC technology from the aspects of visible light communication, modulation and coding, optical signal transmission and orbital angular momentum (OAM), etc. By reviewing the frontier technologies and hot spot in the development of OWC, introducing a new theory, new method and new technology, discussing the developing trend of future OWC technology, this Special Issue shows a good way for OWC research, and provides references for designing and developing OWC systems and technologies, so as to promote the upgrading of OWC technology and meet the requirements of access network technology in the age of intelligence.