The invention discloses a power test device which includes a voltage conversion module which is used for being connected with a to-be-tested load and receiving an input voltage, wherein the voltage conversion module converts the input voltage into a voltage value which matches the work voltage of the to-be-tested load so as to provide the voltage to the to-be-tested load; a current detection module which is used for being connected with the voltage conversion module, wherein the current detection module receives the input voltage and detects a current value of the to-be-tested load; a power operation processor which is used for receiving the current value detected by the current detection module and outputting the power of the to-be-tested load via processing; and a display module which is connected with the power operation processor and used for displaying the power of the to-be-tested load, obtained through operation by the power operation processor. The power test device is capable of measuring the power consumption of the to-be-tested load conveniently and accurately.