To be able to take a lesson in the earth orbit at an altitude of about 400 kilometers requires strong aerospace technology support, as well as the support of space resources such as space communications. The smooth and smooth completion reflects China's scientific and technological progress and innovation achievements. At the same time, from creativity to implementation, the "Tiangong classroom" not only stems from self-confidence in ability, but also reflects the importance of scientific research. Scientific exploration and research has always been a strong traction and main output of the aerospace industry. At present, China's aerospace industry is on the road from large to strong. The manned aerospace project will complete the "three-step" plan this year, build the space station and operate for a long time. As Zhou Jianping, chief designer of China's manned space engineering, said, "shipbuilding is for building stations, and building stations is for application". The shocking scenes of rocket launching spacecraft and the exciting space rendezvous and docking. The ultimate purpose of the construction of the space station supported by these aerospace engineering capabilities is to give full play to the role of the National Space Laboratory for scientific research and scientific application and provide a unique platform for scientific research. In fact, whether flying out of the earth, landing on the moon, Mars, or even flying out of the solar system, curiosity about the unknown and desire for the mysteries of the universe have always been accompanied and promoted by the continuous progress of interstellar exploration ability. Nowadays, "Tiangong classroom" is gradually becoming a national brand of space science popularization in China. Although it is a small display and application of the space station science platform, it is of great significance. Scientific and technological innovation and scientific popularization are the two wings of innovation and development. Scientific popularization has the same important position as scientific and technological innovation. Space teaching can not only stimulate people's interest in aerospace and science, but also enhance the public's understanding and support for major scientific programs such as aerospace with high threshold and long return cycle. It will also plant scientific seeds in the hearts of teenagers and wait for their dreams to take root. "Flying dream is never weightless, and the tension of scientific dream is infinite". This sentence not only expresses the meaning of "Tiangong classroom", but also a perfect description of space exploration. (outlook new era)