With widespread of internet and communication technologies, various smart devices have become reachable and controllable regardless of their geographic locations. The Internet of Things (IoT) technology enables communication of smart devices that can connect through the internet, and ranges from smart homes to smart cities. The IoT has been widely used in various domains such as business, healthcare, agriculture, government and education to accomplish variety of purposes. In this study, IoT based mobile smart home surveillance application has been developed for controlling smart home system with the purpose of reducing human intervention and increasing security, privacy and energy efficiency. In this application, smart sensors are controlled by our web service and our mobile application that utilizes react native technologies, and it allows data from the sensors in our smart home prototype to be recorded in the database periodically with quartz.net technology, interpreting this data and allowing users to be informed via the mobile application. This application is an example of monitoring smart homes that provides solutions for the problems arise in IoT applications and enables to process smart sensor data to get insight for future use of smart homes.