The data center is a significant space that serves as a place to store equipment related to the server. Important data must also be safeguarded inside the server room itself, thus security standards are required to safeguard the space, starting with air temperature, humidity, fire disaster prevention, etc. In this paper, the authors propose an Internet of Things (IoT)-based system that uses MPX5100dp sensor for measuring room pressure, the DHT11 sensor, to detect humidity and temperature, with Node-MCU ESP8266 as the transmitter and microcontroller, and the Blynk application as the MQTT bridge to display the measurements and actuator reactions on mobile phones with Android as the platform. The mechanism on this device can track the temperature of the data center's room in real time and could run as expected. This has been proven by testing.