A new technique for the production of femtosecond X-rays using the inverse Compton scattering was described. This new method provides high quality monochromatic X-rays short pulse, that is monochromatic and has high brightness and tunable energy performed by using a very compact system. A new electron accelerator and a high brightness laser system, which are under developing, will make 3×10⁷ X-ray per pulse with a lenght of 200 fs. The technological development for the accelerator and the laser system is performed successfully this half year, and we will demonstrate an X-ray source in near future.