The invention discloses a plug-and-play connector of a detection device of a substation patrol robot and a control method. When a plug-and-play module has no detection device access, a control module disconnects a power source and a male connector through a power source management module, voltage is applied to a detection device identifying connector to carry out detection, when any device is in access, which device has access to a robot body is determined, the control module uploads access device information to a robot industrial control machine through a communication port, the power source management module is started to supply power to the detection device, the detection device detects the power supply current in real time, and when it is found that the power supply current is zero, it explains that the detection device is separated from the robot body, the power source management module closes the power supply power source, and one cycle is completed. Plug-and-play operation of various detection devices of the substation patrol robot can be achieved, and therefore in a substation, various substation patrol tasks can be completed only through one robot.