Method for verifying the field device inventory entered in an asset management system, wherein a plurality of field devices (FG1, FG2, FG3) are integrated in a first communication network, comprising: i. Connecting a processing unit to the first communication network; ii. Reading out the address space of the first communication network using the processing unit to generate a list of all field devices (FG1, FG2, FG3) located in the address space; iii. Establishment of communication between the processing unit and a field device (FG1, FG2, FG3) in the list via a communication path in the first communication network; iv. Reading out identification information of the field device (FG1, FG2, FG3) via the established communication by means of the processing unit, wherein the identification information comprises at least a serial number of the field device (FG1, FG2, FG3) and a feature parameter of the field device (FG1, FG2, FG3), in particular its communication path; v. Performing a consistency check on the Asset Management System, whereby a negative result of the consistency check is obtained if a field device (FG1, FG2, FG3) is already entered in the Asset Management System under the serial number read out; vi. In the event of a negative result of the consistency check, check whether a characteristic parameter assigned to the field device (FG1, FG2, FG3) in the Asset Management System corresponds to the characteristic parameter read out; and vii. Output of a notification of a need for action by means of the processing unit in the event that a characteristic parameter assigned to the field device (FG1, FG2, FG3) in the asset management system deviates from the characteristic parameter read out. i. Connecting a processing unit to the first communication network; ii. Reading out the address space of the first communication network using the processing unit to generate a list of all field devices (FG1, FG2, FG3) located in the address space; iii. Establishment of communication between the processing unit and a field device (FG1, FG2, FG3) in the list via a communication path in the first communication network; iv. Reading out identification information of the field device (FG1, FG2, FG3) via the established communication by means of the processing unit, wherein the identification information comprises at least a serial number of the field device (FG1, FG2, FG3) and a feature parameter of the field device (FG1, FG2, FG3), in particular its communication path; v. Performing a consistency check on the Asset Management System, whereby a negative result of the consistency check is obtained if a field device (FG1, FG2, FG3) is already entered in the Asset Management System under the serial number read out; vi. In the event of a negative result of the consistency check, check whether a characteristic parameter assigned to the field device (FG1, FG2, FG3) in the Asset Management System corresponds to the characteristic parameter read out; and vii. Output of a notification of a need for action by means of the processing unit in the event that a characteristic parameter assigned to the field device (FG1, FG2, FG3) in the asset management system deviates from the characteristic parameter read out.