The embodiment of the invention discloses a power transmission line state monitoring method and system. The method comprises: a pre-establishment step used for obtaining parameters of a target networkdevice to establish a database; a pixel establishment step used for establishing a pixel of the target network device and adding tower standard parameters of the target network device to an attributelabel corresponding to the pixel; and an interface generation step used for generating an interface according to the position and the connection relation between the pixel and the pixel.