Abstract: Galileo Global Navigation Satellite System is the first civil GNSS of the world constructed and owned by European Union.Through many years' development, Galileo system had formulated a better management and operation system. European Council and European Parliament issued a series of regulation to clarify the steps of development, the structure of management and the framework of international cooperation, which are the bases for operation and application of Galileo GNSS. At the same time, Galileo system also encountered many legal issues such as international liability, diplomatic privileges and immunity, civil liability etc. It is necessary to consider their successful achievements in BDS law-making process.