IoT device monitoring refers to the continuous tracking and supervision of connected devices using IoT technologies, sensors, and cloud platforms. It enables real-time visibility into device performance, status, health, and data flow across networks. This system helps detect faults, prevent failures, ensure security, and optimize operations through remote access, alerts, and analytics. IoT device monitoring is widely used in smart cities, healthcare, industrial automation, agriculture, smart water systems, and energy management to improve efficiency, reliability, and system intelligence.