A power outlet apparatus with multiple sockets detection, and the detection method and module thereof are disclosed. The apparatus includes a plurality of socket groups, a plurality of current detection unit, a voltage detection unit, a processing unit, and an output unit. In which the current detection units are installed at the socket groups respectively, for detecting a current data corresponding to each socket group. And the voltage detection unit is for measuring a voltage data of the socket groups. The voltage data and the current data are processed by a processing unit for obtaining an electricity information of each socket group.