Column switch operation state monitoring device and detection method

The invention relates to the field of electric power, in particular to a pole-mounted switch operation state monitoring device and detection method, the device comprises a first detection module, a second detection module, a power supply module and a data communication module, the first detection module is installed at a pointer of a pole-mounted switch, and the second detection module is installed at a contact of the pole-mounted switch; the method comprises the following steps: if the first detection module detects that the pole-mounted switch is in an opening state, remotely sending a first early warning signal through the data communication module; if the second detection module detects that the pole-mounted switch is in the opening state, a second early warning signal is remotely sent through the data communication module; if the first early warning signal and the second early warning signal are received at the same time, outputting that the corresponding pole-mounted switch is in an opening state; accor