This Paper presents an IoT-based drainage block detection and cleaning system designed to address frequent drainage blockages that cause waterlogging, foul odors, and health risks. The system uses sensors such as ultrasonic, flow, and gas detectors to monitor water levels and detect blockages in real time. Data is transmitted to a control room dashboard via IoT modules (ESP8266/ESP32), where alerts are generated when abnormal conditions occur. A mechanized cleaning unit, controlled remotely from the control room, removes solid waste using motorized arms or brushes, reducing manual intervention and ensuring worker safety. The proposed system provides an efficient, low-cost, and smart solution for real-time monitoring and automated drainage maintenance, contributing to safer and cleaner urban environments.