Abstract: A fully digitalized B-imaging system solution was presented in this paper, possessing 16 channels and 80 mapping array elements, designed with a high integration ultrasound transmitting and echo receiving circuit, being able digital ultrasound imaging based on FPGA and USB technologies. Compared with the traditional analog solutions, this solution can greatly reduce the area of the system and power consumption with better resolution and detection accuracy. It also can be adopted into the community medical service, large-scale sport events rescue and any other fields like this. Based on the presented solution, a prototype of the portable B-imaging system was made. The test result shows the feasibility of the system.