As a result of recent developments in electronic equipment and sensor technology, usage and implementation models of building automation systems (BAS) are increasing. BAS provides smart, automatic and centralized management of various different services. However, BAS implementation contains several challenges. Due to realization of different services with hardware that can be very different from each other; it is very hard to propose an automatic management model that is suitable to each service. In this study, as a specific service included in BAS services, an emergency evacuation model is proposed. Moreover, a service model and corresponding definitions that can be appropriate to various hardware and software tools, are proposed. In other words, a practical and efficient model is proposed for emergency evacuation scenario. A management approach is also demonstrated. Beside these, in order to show practicality of service definitions, implementation by using hardware and software tools with low costs are realized.