An internal memory power supply system comprises a time sequence control unit, a state detection unit, a control unit, a first voltage regulator, a second voltage regulator, a first group of internal memory slots and a second group of internal memory slots. The time sequence control unit is used for outputting an enabling signal when power needs to be supplied to internal memory modules which are connected into the first group of internal memory slots and the second group of internal memory slots in an inserted mode. The enabling signal passes through the control unit and is output to the first voltage regulator and the second voltage regulator. After receiving the enabling signal, the first voltage regulator and the second voltage regulator respectively supply the power to the internal memory modules which are connected into the first group of internal memory slots and the second group of internal memory slots in the inserted mode. The state detection unit is used for detecting the working states of the internal memory modules. When the situation that the internal memory module which is connected into the first group of internal memory slots in the inserted mode is damaged is detected, the state detection unit sends a signal to the control unit. After receiving the signal, the control unit controls the first voltage regulator to stop supplying the power to the internal memory module which is connected into the first group of internal memory slots in the inserted mode. The internal memory power supply system can be used for maintaining normal operation of electronic equipment when a certain internal memory module is damaged.