A system for monitoring at least one medical product (2, 6) with at least two monitoring devices (27 - 36) which are connected or can be connected to each other in a monitoring network in a data-conducting manner and which each have a detection device which is configured to detect whether a transponder (4, 8) of the medical product (2, 6) is located in a detection region (39 - 48) extending around the respective monitoring device (27 - 36), wherein the at least two monitoring devices (27 - 36) are arranged in such a way that the detection regions (39 - 48) of the at least two monitoring devices (27 - 36) overlap, a data processing device which is connected or connectable in a data-conductive manner to the at least two monitoring devices (27 - 36) via the monitoring network and which is configured to store times of detections of the transponder (4, 8) by the monitoring devices (27 - 36), and a storage device, characterized in that the data processing device is configured to calculate periods in which the transponder (4, 8) is located exclusively in one of the detection regions (39 - 48) of the at least two monitoring devices (27 - 36), to compare the calculated periods with corresponding target periods stored in the storage device and to output corresponding alarm signals if target periods are exceeded, and/or to register sequences in which the at least two monitoring devices (27 - 36) detect the transponder (4, 8) in the detection regions (39 - 48), to compare the registered sequences with corresponding target sequences stored in the storage device and to output corresponding alarm signals in the event of a deviation from target sequences. at least two monitoring devices (27 - 36) which are connected or can be connected to each other in a monitoring network in a data-conducting manner and which each have a detection device which is configured to detect whether a transponder (4, 8) of the medical product (2, 6) is located in a detection region (39 - 48) extending around the respective monitoring device (27 - 36), wherein the at least two monitoring devices (27 - 36) are arranged in such a way that the detection regions (39 - 48) of the at least two monitoring devices (27 - 36) overlap, a data processing device which is connected or connectable in a data-conductive manner to the at least two monitoring devices (27 - 36) via the monitoring network and which is configured to store times of detections of the transponder (4, 8) by the monitoring devices (27 - 36), and a storage device, characterized in that the data processing device is configured to calculate periods in which the transponder (4, 8) is located exclusively in one of the detection regions (39 - 48) of the at least two monitoring devices (27 - 36), to compare the calculated periods with corresponding target periods stored in the storage device and to output corresponding alarm signals if target periods are exceeded, and/or to register sequences in which the at least two monitoring devices (27 - 36) detect the transponder (4, 8) in the detection regions (39 - 48), to compare the registered sequences with corresponding target sequences stored in the storage device and to output corresponding alarm signals in the event of a deviation from target sequences.