Overheat protection, Automatically cutting off heating with audible and visual indication when the autoclave is overheated. Anti-burning protection automatically cutting off heating with audible and visual indication when the autoclave is lack of water. Interlock safety preventing from starting a cycle if door is not properly closed or from door opening if there is pressure inside chamber. Steam pressure safety valve automatically works when the chamber pressure exceeds the limit. Automatic operation of sterilization with PID microprocessor control and LED display. Positive pulsing function removes the air efficiently. Automatic air discharge control prevents boil over of liquids and explosions of bottles, with Power-off memory function, Internal water tank with steam-water internal circulation with drying function, automatic operation from sterilization to drying process can be easily set by the interactive key input system.