Abstract:After the half-a-century development, space science has not only explored and settled new frontiers, expanding human's understanding about nature and human itself, but also lead the rapid development of space and related technologies, and also brought about a number of innovative applications, which has been advancing national scientific, security, economic and social interest and human life quality. China has laid a certain foundation in space science research through 50 years of development. In 2011, the go-ahead of Strategic Priority Program (SPP) on Space Science marked that China's space science had entered a new stage. With an analysis of domestic space science status as the beginning, the paper poses the scientific questions to be addressed by Chinese space science community in 2016-2030, which is a) how did matter originate, how does it evolve and move? b) what's the relationship between the solar system and human beings? Besides, The Chinese space science strategic goal is proposed, i.e. to make great scientific discoveries and achieve innovative breakthroughs by a series of scientific satellite programs and missions in frontier scientific fields, such as the formation and evolution of the universe, the exploration of exoplanets and extraterrestrial life, the formation and evolution of the solar system, solar activities and their impact on the earth's space environment, the development and evolution of the earth's system, new physics beyond the current basic physics theories, the law of matter motion and the law of life activity in space environment, etc; and to drive the great-leap-forward of aerospace and related high technologies. In addition, the paper also proposes the space science programs and missions through 2030, and probes into the supporting technical capability. Through the implementation of a series of space science programs and missions, it is expected to make due contribution to China's economic and social development and human's civilization.