The invention relates to an electric energy meter or an electric load management terminal checking unit, wherein an electric measuring signal generator, a standard measurer and an epiposition processing display are communicated and connected with corresponding interfaces of a master control box respectively; the master control box is communicated and connected with a host computer; a measured current signal acquisition unit, a current/voltage (I/V) conversion unit, an A/D conversion module and a singlechip of a reactance abrasive cutting acquisition processor are connected with each other in turn; a reactance testing circuit in the measured current signal acquisition unit is in parallel connection with a current output total terminal of the electric measuring signal generator and is simultaneously in parallel connection with various epiposition current access sockets; the singlechip is communicated and connected with a corresponding interface of the master control box; and the host computer controls the reactance abrasive cutting acquisition processor through the master control box to respectively acquire the current value of the epiposition current access sockets when the currentis switched off and on, measure the current value of each epiposition current access socket when the current is switched off in turn, and respectively calculate relative reactance value of various epipositions, so as to obtain the open-circuit state of various electric energy meters or various electric load management terminals.