Abstract: Both the EU Galileo program and the US GPS modernization program own a solid legal basis. EU legislations on GNSS provide inter alia the general framework for governance of Galileo program, the financial and budgetary matters, and the public procurement. US legislations define the powers and functions of the public authorities in the development, maintenance and application stage of GPS, and nowadays, the LightSquared interference and the privacy protection concerning to geolocation information have received more focus from the US legislators. Drawing on the advanced experience from EU and US, China's future legislation on BeiDou system should at least take into consideration the issues as follows: the legislative modality, public governance, compatibility and interoperability of different systems, public procurement, non-discrimination, anti-interference, protection of privacy and personal data, and international cooperation.