The invention relates to a method for displaying Mongolian on a GNOME desktop system platform of an LINUX system. The method comprises steps of building a Mongolian processing system engine in a Pango system processing word language in the GNOME desktop system, registering a name of the Mongolian processing system to the Pango system executing word langue processing, forming an interface between the Mongolian processing system engine and a word langue processing module of an operation system, generating a Mongolian processing module based on rules and structures of an Open Type font in the Mongolian processing system engine, constructing an font section engine to select and replace the Open Type Mongolian font, and finally obtaining correct Mongolian display results after font selecting replacement. Mongolian display and intelligent input thereof on the basis of the Unicode in the Linux operation system are realized by the method, and the Mongolian display and the intelligent input method thereof can be used together with Chinese or other language input methods which are loaded and can not affect original functions and applications thereof.