The aim of this paper is to study mobile geographic information system (mobile-GIS) technology to design an asking for direction multimedia system, by applying ArcGIS Engine developer kit, Database Management System (DBMS) and Winsock mechanism in Microsoft Visual Basic 6.0 computer programming environment, to help mobile telephone users find right target location in short time in secondary development. Databases store various types of geographic data with location information. The prototype system developed implements the function of asking for direction. After the Multimedia Message Service (MMS) request is sent, the multimedia message in picture format with detailed map information through wireless network will be received, which can be displayed on mobile telephones. According to the map instruction, mobile users can find the correct destination and a lot of time can also be saved. The result shows that the prototype system runs relatively stable. As a kind of value-added service of China mobile, the prototype system is worthy to popularize.