This thesis is to study and design a check for microwave leakage detection for problems of microwave leakage from the microwave oven. The objective of this project is to use microcontroller, the With the circuit detector that connect to the dipole antenna The work of the machine will use dipole antenna frequency 2.45 GHz. Get wave the microwave conducts the detector to detect the signal antenna receiving voltage and analog at the voltage circuit well control to display the measured out the screen. LCD measurements will let people know that a microwave leakage measure how a warning when the microwave detector includes in the dangerous and cutting function of the microwave oven. The work of the machine can measure the leakage of microwave standard limit.