A power supply system for a toilet includes a controller power supply circuit, including an input end electrically connected to an external power supply and an output end. The system includes an assembly driving power supply circuit, including an input end electrically connected to the external power supply and an output end. The power supply system also includes a controller circuit, including a power supply end electrically connected to the output end of the controller power supply circuit and an output end communicably connected to a control end of a switch control circuit of the assembly driving power supply circuit. The system also includes a driving component circuit, including a power supply end electrically connected to the output end of the assembly driving power supply circuit. An output power of the controller power supply circuit is lower than an output power of the assembly driving power supply circuit.