This invention discloses a power consumption testing method of a mobile terminal and a power consumption testing system of the mobile terminal. The power consumption testing method of the mobile terminal comprises the following steps: establish a communication connection between the mobile terminal and a tester through a wireless fidelity Wi-Fi network, wherein Wi-Fi signals of the tester are preset as the Wi-Fi signals of a constant power, a fixed channel and a fixed network type; trigger the mobile terminal to communicate with the tester at a preset transmission rate; trigger the mobile terminal to turn off the screen and stop running irrelevant application programs, wherein the irrelevant application programs refer to the application programs that are irrelevant to the power consumption testing; and detect a current average of the mobile terminal in a preset duration so as to compute the power consumption average of the mobile terminal based on the current average. The technical scheme provided by this invention can test the Wi-Fi power consumption of the mobile terminal.