An ultrasonic image processing system comprising: a data receiving module for acquiring multiple sets of three-dimensional image data corresponding to a single target tissue; an image analyzing module for dividing, on the basis of any one group of the multiple sets of three-dimensional image data, a target region to obtain a three-dimensional volume structure boundary of the target region, and a safety boundary generated by outward expansion or inward contraction along the three-dimensional volume structure boundary; an image mapping module for establishing a spatial mapping relation between the multiple sets of three-dimensional image data, and according to the spatial mapping relation, mapping the three-dimensional volume structure boundary and the safety boundary of the target region to the other sets of three-dimensional image data; and an image marking module for marking, in a displayed image, corresponding three-dimensional volume structure boundaries and safety boundaries of the target region in the multiple sets of three-dimensional image data, or regions within the three-dimensional volume structure boundaries and safety boundaries. The system is capable of solving the problem in the prior art in which collection, analysis and quantitative display cannot be performed on the ultrasonic images during the treatment process.