Auto off switch iron is a product that acts like a circuit breaker to interrupt the flow of the electricity from the socket to the iron. Mostly the iron system in the current market still uses the classic switching system which means the output is just produced on and off to control the temperature of iron without permanently cut the current through to iron. Besides, decision making from the latest project only cuts the current if there is no motion and current in low without setting any range to switch the timer to off the iron system. The goal of this product is to develop the fuzzy logic controller (FLC) in the auto off switching iron. Rules of the fuzzy logic enable to control of the complex system to be more effectively compared classical method which operates on discrete value only. The design of the fuzzy logic controller (FLC) will implement in Arduino Nano to control the auto off switch iron. This study uses the current sensor and ultrasonic sensor as the input that will send the signal to the Arduino nano as the controller to set the output. The process of this entire product is to collect the signal from the input which is the sensor, analyze the input in fuzzy controller and obtain the right time to auto off the switch iron. All the rules of membership function will set in Mamdani Fuzzy Inference System in MATLAB software. This project can avoid human interruption to decide the output and make the controller more intelligent to represent the decision.