Transformer intelligent oil level abnormity monitoring device and monitoring method thereof

The invention discloses a transformer intelligent oil level abnormity monitoring device, and the device comprises an upper flange, an upper point position pressure sensor, a main oil pipe, a temperature sensor, a data collecting and processing module, a lower point position pressure sensor, an observation window, a device shell, an outgoing line waterproof connector and a lower flange, wherein the upper flange, the main oil pipe and the lower flange are sequentially connected; an upper point location pressure sensor and a lower point location pressure sensor are arranged on the main oil pipe from top to bottom, and meanwhile a temperature sensor and a data collecting and processing module are further arranged on the main oil pipe. The device shell is provided with an observation window and an outgoing line waterproof connector, the outgoing line waterproof connector is used for locking a power line to prevent internal components from being affected with damp, and the upper flange is connected with a tail end