Aimed at the requirement of intelligent transport system construction in Taiyuan, based on Tianditu mobile API and IOS platform, this article designes a mobile application named Intelligent Bus Mobile Application System. The system provides city bus query services and value-added services. City bus query services such as static bus information query, real time bus information query, nearby bus information query, bus transfer information query, etc., value-added services like POI query, weather query and traffic management notice, etc. This solves the problem that public is unsatisfied with the travel information provided by traditional public transportation management system and makes it real smart travel.