A new model of ultrasound biomicroscope(UBM)system for ophthalmology was designed and implemented.With a fairly long focal length(13mm)transducer and a sector scan probe,the sys- tem features the wide-view imaging for eyes.The scan window can be switched between 4.8mm (6mm and 9.6mm(12mm(width(depth).Another advantage is that the transducer is far enough from the cornea during check so that the danger for hurting the cornea is largely reduced.The signal to noise ratio of the image is enhanced by dynamic frame averaging,which is performed with hardware based on a Field Programmable Gate Array(FPGA)chip.With center frequency of 50MHz the radial and lateral resolution power of the system is better than 50(m and 100(m respectively.A novel strati- fied phantom was designed to evaluate the axial resolution accurately.