5G has three main application characteristics: high transmission rate, low transmission delay, and multi-person connection. At present, the 5G specification standard has not been fully formulated, but at the URLLC that everyone is concerned about, the low latency and high reliability must be from the chip to the mobile phone and the terminal to The integration of the system will do a good job in this field. 5G is a new opportunity. Taiwan has a complete industrial chain. Using the 5G environment, SMEs can use this new environment to quickly provide customer service. The application of 5G in vertical fields has yet to be developed. Cross-domain cooperation is the key to success. It is foreseeable that 4G will work in conjunction with 5G in the future. The dense optical fiber network is an important foundation for the success of 5G. 5G technology and business models are under development. Early trials can capture market opportunities.