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In order to study the actual state of motion and trajectory of the sun and its eight planets in different reference systems, this paper uses the Development Ephemerides 430 to calculate the actual state vectors in the celestial centroid system of each celestial body, and introduces the conversion methods among different reference systems then gets the coordinates of the planets in the Conventional Inertial System and Conventional Terrestrial System. Based on C # and SharpGL, this paper designs a solar system space display system to realize location calculation, the dynamic display, trajectory mapping and viewpoint change of the celestial bodies in different reference systems, and the system is further optimized. The result shows that the celestial bodies have different operating status in different reference systems and have their own law.