At night, prepare a short and small fluorescence lamp to manage( if 6 ws, 8 ws or emergency light are in charge of), and close the indoor electric light, Enable measuring the environment in the darkness. In microwave oven after working state, in charge of and move slowly close to the furnace gate lamp, If lamps can not be in charge of bright, prove that the microwave oven was not let out microwavly , or the letting out amount is within the range of safety standard; If lamp in charge of shinny little and on and prove lamp in charge of and have microwave to leak in corresponding positions, Should be out of use immediately, repair, in case that bring the adverse effect on the health. The method measure microwave to leak, because microwave to excite in inning charge of the fluorescence material of the wall sends out the fluorescence fluorescence lamp.