Using the Sigfox network and the Internet, we created an IoT device equipped with temperature, humidity, and barometric pressure sensors that are related to the environment. We acquired environment-related data from IoT devices and displayed it on the Web using ThinSpeak. Furthermore, the data was processed using Matlab / Simulink, and the data such as discomfort coefficient and heat coefficient could be redisplayed using ThingSpeak. In this research, the IoT device was installed in a high school as part of a high school-university collaboration research, and data was successfully acquired without going through the network in the high school. Furthermore, we were able to display the results on the PCs and smartphones of all concerned parties. In the future, I would like to aim to build an education system that uses a large amount of data obtained from sensors.