A mobile terminal power source management method, comprising: when a battery is charged or discharged, detecting a voltage difference between one side of a switch circuit, which is connected to a charging chip and a mainboard, and the other side thereof connected to the positive electrode of the battery (101); and judging a charging or discharging state of a mobile terminal power source according to the detected voltage difference (102). By means of the technical solution, a user can promptly know the input and output of a mobile terminal power source and a state of the electric quantity of the mobile terminal power source, and can intuitively know how long the mobile terminal can be further used, and the mobile terminal can also rationally control the output of the power source thereof according to the state of the power source thereof.
