A color image terminal which can be used for submarine acoustic imaging system is introduced in this paper. Imaging signals, data rate above 375 KB/S, can be in real time processed in this system. It can give an insert processing of the imaging signals produced in both Modes C and B. The coordinate can be transformed quickly and in real time when Mode Bworks The luminace information can be turned into false color information by a color coder. All kinds of imaging parameters are displayed on the screen at the same time. The raster scan system is used for the image terminal. The capacity of the image memory is 512k Bit. The characters, parameters and synchronous control signals are given by a microcomputer TP-805.