Input/output switching method, electronic device, and system for a server

An input/output switching system, comprising:

• at least one connector, being used to connect with at least one electronic card, and comprising at least one first standard-bus pin group, at least one second standard-bus pin group, a first distinguishing-signal pin group and a second distinguishing-signal pin group, wherein the at least one first standard-bus pin group and the at least one second standard-bus pin group belong to different bus interface standards;
• a BMC, being used to connect with the second distinguishing-signal pin group and generate a second determination result according to a second distinguishing signal transmitted from the second distinguishing-signal pin group to the BMC;
• a logic-determination device, which comprises a switch-control module, a BMC register, and the logic-determination device receives an external signal, the logic-determination device generates a first determination result which is used for determination of type of the at least one electronic card by receiving a first distinguishing signal transmitted from the first distinguishing-signal pin group;
• the BMC register is used to receive the second determination result and transmit the second determination result to the switch-control module, the switch-control module turns on/off a conduction of the at least one second standard-bus pin group of the at least one connector according to the first determination result, the second determination result and the external switch signal.