Autonomous controllable multi-protocol meter access online monitoring device and monitoring method

The invention discloses an autonomous controllable multi-protocol meter access on-line monitoring device and a monitoring method, the autonomous controllable multi-protocol meter access on-line monitoring device comprises a power panel, an interface board and a core board, the power panel is connected with the interface board through a connector, the interface board is used as a carrier plate to be connected with the core board, and the monitoring device can be accessed to various meters. The collected data can be synchronously analyzed and processed, and the data can be uploaded to different station level monitoring systems; the core board completes data acquisition, data processing, data uploading and command issuing; the interface board is used for leading out an external terminal to complete physical connection with the outside; the interface board is provided with an RS485 bus interface, an RS232 bus interface, an RJ-45 interface and an optical Ethernet interface. The on-line monitoring device is wide in