**5. Conclusion**

In order to improve the mobility of the visually impaired in indoor area, an IoTsensor-based route guidance technology was designed and presented in this chapter. To this end, a system was developed, such as an IoT-sensor-based user positioning algorithm and a mobile app that reflects the UI according to the app accessibility guidelines that reflect the user's convenience. For the evaluation of the developed technology, the IoT sensor map was mapped for the urban railway station, which is one of the representative indoor areas, and the app for the simulation test was additionally produced, and the user satisfaction level of the application of this developed system for the visually impaired was investigated. As a result of the user satisfaction survey, it was confirmed that the user satisfaction improved significantly compared to before the application of this developed system. In addition, with just the app for the simulation test the visually impaired people who participated in the simulation test could check the station and the route to destination before going out in advance and experience the route to the station they wanted to go, so it was possible to confirm the utility of the technology proposed in this chapter, such as many opinions were suggested that it can be usefully used. Moreover, if the improvement of the voice recognition rate specialized for the relevant indoor area, such as a railway station, is supplemented, it is expected that it will be possible to dramatically improve the mobility support of the visually impaired and user satisfaction through the minimum hardware installation in the indoor area and software technology.
