Open science has been gradually changing the traditional paradigm of scientific research. And this paper aims to explore the concept and connotation of open science from multiple perspectives,so as to provide theoretical and practical support for future active participation in the open science movement. Adopting both methods of literature research and network investigation, this paper makes an in-depth analysis of open science,focusing on its basic concept, overall system and macroscopic ideas. Combining with the idea of" freedom,openness,cooperation and sharing",this paper analyzes the basic concept of open science,and then tries to construct an overall system of open science, covering open science policy, open access, open data, open resources,open peer review and open educational resources.