Method for verifying the field device inventory entered in an asset management system (AMS), wherein a plurality of field devices (FG1, FG2, FG3) are integrated in a first communication network (KN1), comprising: i. Connecting a processing unit (VE) to the first communication network (KN1); ii. Reading out the address space of the first communication network (KN1) using the processing unit (VE) to generate a list of all field devices (FG1, FG2, FG3) located in the address space; iii. Establishment of communication between the processing unit (VE) and a field device (FG1, FG2, FG3) in the list via a communication path (KP) in the first communication network (KN1); iv. Reading out identification information of the field device (FG1, FG2, FG3) via the established communication by means of the processing unit (VE), 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 (AMS), 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 (AMS) 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 (AMS) corresponds to the characteristic parameter read out; and vii. Output of a notification of a need for action by means of the processing unit (VE) in the event that a characteristic parameter assigned to the field device (FG1, FG2, FG3) in the asset management system (AMS) deviates from the characteristic parameter read out. i. Connecting a processing unit (VE) to the first communication network (KN1); ii. Reading out the address space of the first communication network (KN1) using the processing unit (VE) to generate a list of all field devices (FG1, FG2, FG3) located in the address space; iii. Establishment of communication between the processing unit (VE) and a field device (FG1, FG2, FG3) in the list via a communication path (KP) in the first communication network (KN1); iv. Reading out identification information of the field device (FG1, FG2, FG3) via the established communication by means of the processing unit (VE), 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 (AMS), 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 (AMS) 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 (AMS) corresponds to the characteristic parameter read out; and vii. Output of a notification of a need for action by means of the processing unit (VE) in the event that a characteristic parameter assigned to the field device (FG1, FG2, FG3) in the asset management system (AMS) deviates from the characteristic parameter read out. <EOS>