Disclosed is an automatic cutoff apparatus that automatically cuts off a power source in a space where people go in and out when it is confirmed that no one is in the space. The apparatus includes: an entrance sensor; at least one moving object sensor; a controller connected to the entrance sensor, the moving object sensor, and configured to cut off the resources in the specific object device when the entrance sensor senses a passage of a moving object but the moving object sensor does not sense a presence of the moving object.