The present disclosure provides a lid lock for a refueling or charging port having: a lifting shaft; a worm wheel; and a worm shaft. The worm wheel and the worm shaft are configured such that the worm shaft rotates in a first direction to drive the worm wheel to rotate, thereby driving the lifting shaft to perform a descending movement in an axial direction of the lifting shaft and then perform a rotational movement to expose a refueling or charging port for supplying fuel or electricity. In some examples, the worm shaft rotates in a second direction to drive the worm wheel to rotate, thereby driving the lifting shaft to perform a rotational movement and then perform an ascending movement in the axial direction of the lifting shaft to close the refueling or charging port. The present disclosure provides an internally retractable lid lock for a refueling or charging port. An internal space between an outer sheet metal of a vehicle and a refueling and charging port is fully utilized, so that a lid can be opened in the internal space, which not only is not limited by an external environment, but also reduces the possibility of damaging parts.