Satellite tool kit (STK) is an important tool to simulate and analyze satellite system in the field of aerospace, which can satisfy the requirements of satellite 2D/3D visual simulation. The orbit model and satellite constellation configuration of the spacecraft are researched. The visual function of STK is used to demonstrate the running condition of the spacecraft on orbit. The report creating function of STK is used to create visual report of the target from the spacecraft and the accurate orbit of the spacecraft is predicted. The simulation system is built finally and the simulation result is proposed.