Abstract: The present invention discloses a steam generating device comprising a control circuit for monitoring the temperature and controlling water filling and heating and steam discharging, and a sealed container which is highly temperature resistant. An electric heating tube is mounted in the container and a temperature sensor is mounted on the outer surface of the container. The electric heating tube and the temperature sensor are connected respectively to the control circuit. On the top of the container there is installed a four-way electromagnetic valve, and on the wall of the four-way electromagnetic valve there is installed a water intake tube connected to a water supply. A steam iron using the steam generating device is also disclosed in the present invention, wherein the steam iron can be used together with the steam generating device and has the virtue of continuous water filling steam generation.