The invention provides a presentation device of a power supply system. The presentation device comprises at least two power supplies, at least two incoming lines, a bus, an automatic throw-in device for an emergency power supply, a plurality of light emitting strips and a presentation platform, wherein the at least two incoming lines are arranged in one-to-one correspondence to the at least two power supplies, first ends of the incoming lines are connected with the power supplies, second ends of the at least two incoming lines are connected with the bus, a circuit breaker is connected in series between the first end and the second end of each incoming line, the automatic throw-in device for the emergency power supply is used for controlling connection and disconnection of the circuit breakers arranged on the at least two incoming lines according to the voltages of the at least two power supplies, at least a part of the light emitting strips are arranged in one-to-one correspondence to the at least two incoming lines and used for displaying whether the incoming lines arranged in correspondence to the at least a part of the light emitting strips are conducted, and the plurality of light emitting strips are arranged on the presentation platform. By the presentation device, the function that the process of improving power supply reliability by means of the emergency power supply is presented is achieved.