The invention provides a battery change method of a handheld terminal. The method comprises the following steps: a switch element in contact with a battery is arranged in a terminal battery case, whenmounting the battery, the switch element is switched off and outputs a switch-off signal; when dismounting the battery, the switch element is switched on and outputs an interrupt signal; the switch element is connected with the MCU system; the MCU system receives the switch-off signal and the interrupt signal; when the MCU system receives the interrupt signal, the MCU system controls the terminalto enter a dormancy mode to reduce the power consumption. By adding one switch element in the battery case, the switch is switched off when the battery is placed; the interrupt signal is produced byswitching on the battery when taking off the battery, and the interrupt signal is transmitted to the MCU system; the MCU system immediately enters the dormancy mode, so that the battery can be changedwhen the terminal is out of turning off, the startup-shutdown time of the terminal is saved, the battery change is improved, and the working efficiency is effectively improved.