Abstract: It is necessary and important to protect the intellectual property (IP) of the satellite navigation signal system (SNSS). Choosing a suitable strategy and mode for IP protection of the BeiDou SNSS is essential for the future development of the system. The SNSS includes all kinds of devices, codes and methods, which may meet the requirements of the patent object and obtain patent protection after the patent approval procedure. However, concerning the patentability of the navigation signal itself, there are great differences in legislation and practice in different countries. This paper discusses the IP protection mode for the SNSS, and analyzes different IP protection strategies in the US and Europe. It is suggested that based on the value orientations of the Beidou SNSS, China should draw lessons from the experience of the US and Europe, clarify the patentability of satellite navigation signals, and adopt relatively loose IP protection strategies, so as to enhance the competitiveness of the Beidou SNSS and promote the development of related industries.