The invention provides a multi-mode power supply management system, applicable to an SOC chip. The multi-mode power supply management system comprises a digital circuit, an analog circuit and a converter output stage, wherein the analog circuit is connected to the digital circuit, and the analog circuit comprises an analog PFM control circuit, a digital PWM control circuit, a first LDO control circuit and a second LDO control circuit; the analog PFM control circuit, the digital PWM control circuit, the first LDO control circuit and the second LDO control circuit form an output driving unit used for supplying an output driving signal for the converter power output stage; and the output driving signal is used for driving the converter power output stage to realize an analog PFM switching power supply output mode, a digital PWM switching power supply output mode, a switching power supply topological LDO output mode and LDO-output-mode voltage output separately.