The invention provides a user interface for power quality supervision and measurement equipment. The interface is applied to an electrical component, such as a switching switch and the like. The interface comprises a first portion arranged on an electrical enclosure, and a second portion capable of being removed from the first portion through being kept not in contact with the electrical enclosure or switching off an electrical component in the electrical enclosure. According to the technical scheme of the invention, the user interface for power quality supervision and measurement equipment (particularly a switching switch system) can be maintained or replaced. Meanwhile, the AC power is free from being cut off and the electrical enclosure of the switching switch is free from being opened.