From the power struggles of ancient sages, nobles, and nobles to the intricate interplay between modern powers, leakage of secrets has always been a widespread concern in the process of information transmission. If a way of communication can be fast, stable and lossless, Pompey will not lose Salus, nor will Ma Su lose Jieting. Numerous events caused by information transmission errors in history will be avoided. Unfortunately for the ancients, today we are fortunate. The possible way to successfully solve problems is not through the transmission of letters by geese or the use of techniques, but rather through a seemingly mysterious concept - quantum communication. From June 25 to 27, the Nishan Dialogue on Digital Civilization of the World Internet Conference was held in Shandong. At the achievement exhibition, the "Jinan 1" quantum micro nano satellite, which was launched in 2022, attracted a lot of attention. As quantum communication goes further and further in the application field, we cannot help but begin to imagine: what future will quantum communication lead humanity to? What role does quantum satellite play in it? The difficulty of quantum communication eavesdropping is one of the fundamental concepts of quantum communication. Quantum has a high appearance rate in various science fiction works in recent years, but it is not easy to accurately define it. Liao Shengkai, a professor level senior engineer of the Quantum information and Quantum Science and Technology Innovation Institute of the Chinese Academy of Sciences, introduced that quantum is an important concept of modern physics, that is, if there is the smallest indivisible basic unit of a physical quantity, the physical quantity is quantized, and the smallest unit is called quantum. "The concept of quantum was put forward by German physicist Planck, and was first used to explain the energy phenomenon of Black-body radiation." Liao Shengkai said, "Subsequent experiments show that other physical quantities such as Angular momentum, charge, energy and so on also have the phenomenon of discontinuous changes in quantization, and quantum mechanics beyond the theoretical framework of Newton's Classical mechanics also came into being." Liao Shengkai introduced that compared with Newton's Classical mechanics, Quantum mechanics has the following characteristics: uncertainty, measurement collapse, and non cloning. These three major features also form the theoretical basis for the realization of quantum communication. One of the research contents of quantum communication is Quantum key distribution. Traditional encryption techniques based on computational complexity have the possibility of being cracked in principle, and the difficulty of cracking only depends on the strength of computing power. With the continuous improvement of mathematics and computing power, the possibility of classical passwords being cracked is increasing day by day, "said Liao Shengkai, "Different from classical communication, the security of Quantum key distribution is based on the basic principles of physics and has nothing to do with the computational complexity. Through the transmission of Quantum state, users in two remote places share a secure key, and use the key to encrypt the information strictly once and for all. This is the only known communication mode that is unconditionally secure in principle and cannot be eavesdropped and deciphered. Another important content of quantum communication is quantity Subordinate teleportation. Quantum teleportation uses quantum entanglement to accurately teleport the unknown Quantum state of a particle to a distant place without teleporting the particle itself. Quantum teleportation is the basic element of constructing distributed Quantum information processing network and Quantum computer. Traditional methods such as wireless communication use satellite communication, which states that "if you want to do something well, you must first use your tools