A power consumption evaluation device and a power consumption evaluation method are provided. The power consumption evaluation device includes a power converter, a counter, and a controller. The power converter includes a power switch. The power switch performs a switching operation according to a control signal, so that the power converter supplies power to a corresponding load among at least one load. The counter counts one of a positive pulse and a negative pulse of the control signal during a measurement period to obtain a count value. The controller generates an evaluation result of the corresponding load according to the count value.

The invention relates to a method for analyzing the electrical consumption of a plurality of electrical appliances operating on a consumption site, by filtering a demand curve representing the electrical consumption of said appliances according to time. Said method is characterized in that it comprises the following steps: before the filtering per se of the demand curve, the demand curve is recorded and digitalized in such a way as to obtain a demand curve digitalized by periods of time; a set of categories of appliances is defined, each category being defined by similar cycles of power variation according to the time; an algorithm is defined for each category of appliances, for filtering the demand curve for said category of appliances, said algorithm being able to extract the power variation cycles from the digitalized demand curve and to allocate the electrical consumption to said category of appliances; then during the filtering per se of the digitalized demand curve, the filtering algorithms for each category of appliance are used successively to identify and regroup the power variation cycles consumed by said electrical appliances, from the digitalized demand curve.