A 9-point active deformable mirror is designed according to the low order aberrations of space cameras, which can generate defocus, astigmatism and coma. The static and dynamic characters are tested. The testing results show that the static charater can reach 0.02λ(λ=632.8 nm) in several testing at 30 minutes time interval, and the repeatability accuracy is 0.01λ. The dynamic character is tested by the ‘Burst measure’ function of 4D interferometer. The response frequency is up to 28 Hz. The deformable mirror is applied to a space camera system as the fold mirror and the aberrations of the system are corrected. The testing results show that the root-mean-square (RMS) of wavefront is reduced from 0.122λ to 0.0896λ, and the modulation transfer function of system is improved from 0.364 to 0.428 at space frequency of 57.2 lp/mm. The test results verify the aberration correction ability of the deformable mirror.