In this work the overview of the presentation of the measuring results and the measuring errors is presented, which is followed by the presentation of the working principle of the induction meters and the electronical ones. The procedure through which the electric meter passes is presented as well, from the arrival in the calibration laboratory, through the calibration, until the final accuracy verification can be given. Entire measuring equipment is described in details as well as the procedure of calibration of the induction and electronical meter. The direction of the development of the calibration laboratory and the measuring equipment are described. In the additional section more details are given about the C.A.T.S. software which is used for the automatical calibration of the meters. At the end there is a discussion about the communications of modern electrical meters between the consumer and the electricity supplier.