Bridges and water channels are a very dangerous source of flooding that can destroy the infrastructure and endanger people. The traditional flood control procedures are based on manual surveillance and thus they might result in a sluggish response in cases of emergency. The paper describes the design and implementation of an IoT-based Smart Bridge System to monitor flood level in real-time and automatically control the gates. The system incorporates microcontroller ESP32/ATmega328, water level sensor, gates that are controlled by servo, GPS module, Wi-Fi communication, LCD display, and buzzer alert. The water level is raised beyond a specified threshold level, the system triggers warning bells, opens the gates with the help of servo motors, and sends real-time location information via a Telnet server, which is based on the Wi-Fi network. GPS module gives the correct geographical positioning, which allows prompt response to emergencies. The suggested system will minimize human intervention; improve the response time as well as increasing safety in flood-prone areas. Such a smart system can be efficiently installed in bridges, dams, and water control systems to avoid damages and loss of lives.