Abstract: Ultrasound computed tomography possesses great application prospects in limb imaging, because it not only has the advantages of conventional ultrasound, non-invasive, no radiation, low cost, but also can provide tomography information. In this paper, the system structure, system control and raw data acquisition process of a new ultrasonic tomography system were introduced and compared with the former prototype developed in the medical ultrasound laboratory of HUST. The data acquisition experiments of thigh and calf abdomen were designed for the early studies of the limb ultrasonic imaging. Compared with the common ultrasound image and anatomical structure of the thigh and calf, the images got from the new system possess a high consistency, which provide a good foundation for the follow-up imaging processing of limbs by ultrasound computed tomography.