At present, the application of Mongolian idioms is dwindling, and its national culture is disappearing gradually. Based on the current situation, the project will collect and organize idioms resources; use Microsoft's ASP.NET technology to develop a web platform to achieve its function modules on learning knowledge and question-answer system; and provide a convenient tool for idioms teaching and learning. The background knowledge base system includes a general base with 35,000 idioms and 15 attributes, and relevant corpus and several sub-bases. This paper elaborates the structure and function of the idiom learning software, as well as the introduction of background knowledge bases and its related fundamental theoretical research progress and development.