Abstract: A method and a system for monitoring a plant automation technology, comprising: a gateway, which is connected for communication with at least one field device via a first communication network, wherein the gateway is embodied to read out data from the field device; and a service device, especially a router or a switch, which is connected for communication with the gateway by means of a second communication network, wherein the service device is embodied to receive via the second communication network the data read-out by the gateway and to transmit to a management application via a third communication network the data queried by the gateway.