The invention relates to the field of electric power, in particular to a single-phase intelligent electric energy meter base comprising a bottom plate and connection terminal blocks. The connection terminal blocks include an input phase line terminal block, an output phase line terminal block, an input neutral line terminal block, and an output null line terminal block that are successively arranged side by side at the front end of the bottom plate. A front side plate is arranged at the front side of the bottom plate; a first interface, a second interface, a third interface, and a fourth interface are formed in the front side plate and correspond to the input phase line terminal block, the output phase line terminal block, the input neutral line terminal block, and the output neutral lineterminal block respectively. Therefore, the process of replacing the single-phase smart energy meter can be completed rapidly and safely even without power interruption.