Portable microscope is a portable metallurgical microscope. It has vertical light source. It is easily used in field to identify the structure of all kinds of metal and alloys when failure occurs in making samples. It can be used identification of casting quality, inspection of raw material or metallurgical structure research and analysis of processed material in factory and laboratory, also can be used in antique gem and surface observation. This microscope adopts a rechargeable LED illuminator, it is portable and easy to use.