The present disclosure provides a power supply module and a power supply system. The power supply module is used as a first power supply module in a computing system which further includes a second power supply module. The first power supply module and the second power supply module are cascaded in sequence. The first power supply module is in a power supplying state and the second power supply module is in an off state. The first power supply module itself is capable of automatically determining whether to turn on another power supply module or not, without any human intervention. In this way, the power distribution board can be simplified, or even eliminated, in which case the individual power supply modules can be connected by wire to reduce the cost.