"Mountains, rivers, forests, fields, lakes and grasses are the community of life". To protect the mountains, rivers and lakes on this land and keep these "starlight" and "golden belt" green and vibrant, we should not only respect and conform to the laws of nature, but also rely on advanced technological means. 5g protects green water and green mountains with the power of connection, and writes "mountain and sea situation" with the temperature of technology. 5g "uphill": weaving a new protective net in midsummer, sunny and hot weather greatly increases the risk of forest fire. How to ensure forest safety and improve forest patrol efficiency? Once a fire occurs, how can the fire be controlled within the "golden 30 minutes"? With the help of 5g, telecom operators and local forestry departments have built a three-dimensional protection framework of "Civil Air Defense + technical defense", and established an information-based forest fire monitoring platform with prevention first and accurate control. At the same time, with the help of 5g terminals, a "air land three-dimensional" fire monitoring pattern has been formed. Forest patrol is a very important work. In the past, ecological forest rangers were required to measure the mountain forests and find out the dangers. Now, a new member, 5g networked UAV, has been added to the team of forest rangers. Through the deployment of UAV nests and the coverage of the air private network, these "5g forest rangers" can realize 24-hour standby and flight planning, and fly to the designated place at the designated time for patrol inspection. In case of fire, forest rangers do not need to go to the site. The 5g network connected UAV comprehensive utilization management platform and 5g network can command multiple UAVs to shoot real-time pictures and send them back at the same time, providing real-time video and data reference for fire control. Cangshan Mountain in Yunnan Province is composed of 19 peaks. The mountains are high, the forests are deep, and it is difficult to travel. If the fire is not found and controlled in time, the consequences will be unimaginable. With the help of 5g networked UAV application system, the situation has become very different. These "5g forest rangers" are equipped with terminal cloud boxes, which can transform the traditional 2.4ghz/5.8ghz transmission band into 5g communication network signals and transmit information to the command center. Through the large screen, the staff can clearly see various dynamic information in the forest area, quickly check the hot spots, and timely discover the hidden dangers of forest fire. Once a fire is found, 5g Internet connected UAVs can cooperate with firefighters. The headquarters can also dispatch large-scale fire-fighting UAVs to carry out bomb fire-fighting operations at the first time, or transport fire-fighting tools and food for firefighters, greatly improving the fire-fighting efficiency. The advantages of high-speed and low delay of 5g network can also efficiently transmit and process massive data for various forest protection cloud platforms. In tuzhai Town, Quanzhou City, Fujian Province, "cloud video broadcasting" is installed at the high point of each key fire prevention area. With the help of 5g network and two algorithms of "intrusion detection and fireworks detection", personnel intrusion can be warned; The two-way calling function of "cloud video broadcasting" is used to remind the passers-by of dangerous behaviors; Through pyrotechnic detection, the alarm will be given at the first time. In the Silan forest area of Sitai branch of Qingyuan forest farm in Hechi City, Guangxi, the ecological forest rangers use the "5g + smart forestry" cloud platform terminal to record the patrol log, and open the app to report the on-site forest patrol in real time. This platform is connected with the big data platform of intelligent forestry such as Tianbao patrol management and intelligent fire prevention, and with the help of 5g network, forestry is realized