A method for measuring electric power includes: mounting a sensing device on a wire between a capturing device and an electronic goods, wherein the capturing device is used for capturing a total power consumption value of the wire; measuring a relative electricity value of the wire using the sensing device; establishing a solution model based on the relative electricity value to output a loop power consumption result of the wire; determining whether the solution model satisfies a predefined condition, wherein the predefined condition includes the loop power consumption result of the wire being close to the power consumption value captured by the capturing device; and when the solution model satisfies the condition, outputting an absolute electricity value of the wire.