Location-based Service provides information according to the user’s location through the mobile network and mobile devices. Instant messaging is a form of communication over the network, and end-user can communicate each other via instant messaging. In this Study, We seek to develop an appropriate location-based service integrated instant messaging prototype system for Taipei Bus. And combined with several cloud services to achieve the purpose of this bus information services. The purpose of this research is to develop a commercial prototype system. This study proposes system architecture and development technologies to meet the pre-set key performance indicators, and then simulate actual use by scenario simulations. This prototype system has been taken a demonstration, to prove its system architecture available for future research or development suitability for the extension of the system of instant messaging integration mechanism.