Ghost imaging has attracted much attention since it was realized.Many significant results have been achieved in the field of ghost imaging, in which the beamsplitter is an indispensable optical component. However, the existence of the beamsplitter hinders the wider application of ghost imaging, especially with the natural light. A method to realize ghost imaging without beamsplitter by modulating the light intensity on the plane of light source is introduced. Then it is studied theoretically and experimentally. Finally, for further applications, the basic model is improved to a more advanced one. The success of the ghost imaging without beamsplitter is very significant to the applications of ghost imaging.