## 6 Conclusions and Future Perspective  
In this paper, we propose the AR-based Smart Building & Town Disaster Management System to solve problems as the fire accidents caused by the fire in urban areas have become larger. Most buildings in Korea are taller than two floors, so the proposed service is expected to reduce the risk of large damages and many casualties. Additionally, it is possible to safely rescue occupants by securing a clear view for users guiding a safe direction through AR-based technologies.  
We implemented this system in a small test-bed and established an AR-based smart building disaster management service system board installed in a total of 10 system devices (electric leak detectors, temperature and humidity sensors, network cameras, multi gas and dust detectors, flame detectors, gas leak detectors, damper breaker, distribution board, and gas valve breaker). Additionally, we composed the Smart Building Model to simulate the AR-based system providing an evacuation guideline service to the occupants and rescuers by scanning the building structure using smart pads in case of a fire inside the building. We implemented the actual system operation by this system board and Smart Building Model. However, this implementation was just a simulation test performed in a small test-bed, therefore, this research will be further studied in the future through application to real smart building and smart city test-beds through various location-based technologies such as building information modeling (BIM), geographic information system (GIS), and radio-frequency identification (RFID) etc. in the future. Through this study, it is expected that it will play an integral role in smart building and smart city domains [21; 22; 23; 24].  
The following notes the novelty and differentiation of the proposed system:  
* **Intelligent service**: AR technology provides rapid structure and evacuation simulation and guidance reflecting the characteristics and environment of buildings and areas in smart city through linkage of physical and virtual domain in the building;
* **Safety Guideline**: Provide safe guideline services to occupants and rescuers in the event of actual fire;
* **IoT-based real-time remote system**: IoT-based remote system capable of quick response in connection with fire department through providing real-time fire occurrence information.  
Therefore, the improvement of national competitiveness in security and safety in smart buildings, and the expansion of industry and promoting employment through linkage and integration by building elements of smart safety field are expected. Through this research, we are making efforts to realize cyber physical system (CPS) and digital twin technology based on Smart-IoT, AI, big data, and further realizing smart cities.  
Figure 21: Result of the proposed system.  
**Author Contributions:** System Modeling; S.P. (Sangunk Park), S.P. (Sangmin Park), L.W.P., T.L. and S.L., Management System Implement: S.H.P., H.J., S.H.L. and S.M.K., Review and Editing: S.P. (Sangmin Park) and L.W.P., Supervision: S.P. (Sehyun Park), Project administration: S.P. ([PERSON]).  
**Funding:** This research received no external funding.  
**Acknowledgments:** This work was supported by the Human Resources Development (No. 20184030202070) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy, and this research was supported by the Chung-Ang University Graduate Research Scholarship in 2017.  
**Conflicts of Interest:** The authors declare no conflict of interest.