A monochromatic imaging system with two-dimensional resolution is designed based on spherically bent crystals. Ray tracing simulation to the imaging process is conducted with the usage of optical simulation software. The backlit imaging to the Au meshes is conducted and a monochromatic mesh image with an energy of 8.048 keV and a spatial resolution of 9 μm is acquired. On the SG-II updated laser facility, with this imaging system, the Kα self-luminous monochromatic image of two-dimensional cone target is successfully acquired. The results show that this imaging system is capable of hot electrons diagnostics in the fast ignition experiments.