Abstract: Based on the properties of wavelet transform, a method of ISAR imaging is proposed in this paper. The time range Dopper image of a target is obtained by processing transversal data extracted from ISAR target echoes with Morlet wavelet transform and finding local maximum of wavelet transform modulus and its location. Then the range temporal Doppler image is obtained by sampling time. The experimental results by using the method proved that not only the radar target high resolution image can be obtained, but also the motion of target can be observed.