Abstract: With the rapid development of aerospace science and technology, the research and exploration to the outer space is getting deeper and broader in various countries.Space flight experiment has developed from a pure scientific research in early years to applications in both civil and commercial areas.International cooperation has become a new trend of the experiment.Strengthening the intellectual property protection of spaceflight objects is becoming more and more important.However, the intellectual property of spaceflight objects is facing a dilemma in granting conditions and entities of application.The existing rule of law of the intellectual property protection needsa new explanationwhen applied to spaceflight objects. To encourage all kinds of entities to be engaged in outer space research and development, international community should formulate bilateral or multilateral agreements on the basis of Outer Space Treaty. Countries should use the legislative experience of the United States and Canada to further develop their domestic legislation. They should also strengthen international cooperation in formulatinginternational conventions to protect intellectual property of space activities.