A power supply bus apparatus and a server having the same are provided. The power supply bus apparatus is suitable for electrically connecting to a power supply module, and includes a first power supply backplane, a first docking structure, and an electrical bus insertion group. The first docking structure is disposed on the first power supply backplane and docked with the power supply module. The electrical bus insertion group is disposed on the first power supply backplane, the electrical bus insertion group includes a first insertion structure and a second insertion structure, and the second insertion structure has a polarity different from that of the first insertion structure.