The invention discloses an electric energy meter overturning device. The electric energy meter overturning device comprises a bottom plate. Sliding rails are arranged on the two sides of the bottom plate correspondingly. One or more overturning assemblies are arranged sequentially in the arrangement direction of the sliding rails. Each overturning assembly comprises an installation plate stretching across the two sliding rails. A rotary shaft perpendicular to the arrangement direction of the sliding rails is installed on each installation plate. An L-shaped overturning frame used for containing an electric energy meter is fixedly arranged on each rotary shaft. One ends of the rotary shafts are connected with driving parts correspondingly, and the rotary shafts are driven by the driving parts to rotate to overturn the electric energy meters on the overturning frames correspondingly. The invention further discloses an electric energy meter overturning method. The overturning assemblies receive the electric energy meters in the side vertical state in the initial positions first, and then the installation plates slide, so that the space between the installation plates reaches a certain distance; then the rotary shafts are rotated to drive the overturning frames to overturn the electric energy meters to the horizontally placed state; and then the rotary shafts rotate reversely, and the installation plates slide reversely so as to be recovered to the initial positions. The electric energy meter overturning device and electric energy meter overturning method both have the advantages that operation is easy and convenient, and the transport efficiency of the electric energy meters is improved.