The invention discloses a measuring box. The measuring box comprises a box body, a measuring device, a box door, an output switch, an output cable, a connecting cable A, an output pipeline, an unlocking and power transmission device, an unlocking wire, a fixing plate, through holes, protrusions, a lock, a shell, a connecting cable B, a door opening, deenergizing and grounding device and an input pipeline. The measuring box of the invention has the advantages of simple and reasonable structure, low production cost and convenient installation. The door opening, deenergizing and grounding device is adopted, the measuring box can be de-energized as long as the box door is opened, namely, after the box door is opened, an electricity conduction wire plate moves rightwards under the action of a spring A so as to be separated from an input wiring plate and an output wiring plate, and therefore, the input wiring plate can be disconnected from the output wiring plate; and at the same time, equipment in the box is grounded, namely, a grounding connection plate moves rightwards under the action of the spring A so as to be connected with a grounding joint A and a grounding joint B, and therefore, the equipment in the measuring box can be grounded timely, and the safety of maintenance personnel can be improved.