Device layer network: the launch of blue tooth mesh accelerated the development of device network solutions. "Lighting Control System" and "Wireless Sensor Network" are the two major use cases that promote the growth of equipment network applications and quickly become the first choice wireless communication platform for many control systems. The low-power Bluetooth mesh topology is optimized for the creation of large device networks. Bluetooth Wireless Sensor Network(WSN) can monitor light, temperature, humidity, and occupancy. It is expected that the annual shipment of Bluetooth equipment network products will increase by five times by 2022, helping to increase employee productivity, reduce building operating costs, and better meet the requirements of production equipment for environmental conditions and maintenance. Location services: Low power Bluetooth broadcast topology is particularly suitable for indoor positioning and location-based services. Bluetooth Beacon based indoor navigation solutions have quickly become a standard method for responding to indoor coverage that GPS can not solve. Smart City has now begun to explore how the landmark Beacon improves the quality of life of its citizens and enhances the experience of tourists. Its solutions are being deployed in office buildings, airports, convention centers, and even urban streets around the world. To help building owners and urban planners better understand how space is used. It is expected that by 2022, the annual shipment of Bluetooth devices based on location services will increase by 10 times. Data transmission: The point-to-point topology of Bluetooth with low power consumption is optimized for extremely low power transmission, making it an ideal choice for interconnected equipment products. Bluetooth wearable device, fitness tracker and smartwatch monitor steps, exercise, exercise and sleep. From blood pressure monitors to portable ultrasound and X-ray systems, Bluetooth technology can help people track and improve overall health, making it easier for medical professionals to provide quality care. And ... Audio transmission: The point-to-point topology of Bluetooth Foundation Rate / Enhanced Data Rate(BR/EDR) has been optimized for audio transmission, making it a standard carrier of wireless audio. Bluetooth headsets, once the forerunner of the wireless audio market, are now essential accessories for mobile phones. The Bluetooth car information entertainment system can be used in conjunction with the driver's smartphone, allowing the driver to focus on the most important roads. It is expected that by 2022, annual shipments of audio transmission and data transmission solutions will increase threefold.