Monitoring method for a filter installation, - wherein the filter installation by way of an intake air duct is supplied an exhaust gas that is loaded with particles, the exhaust gas in the filter installation is relieved of the particles, and the exhaust gas relieved of the particles is discharged by the filter installation by way of an exhaust air duct, - wherein relieving a first part of the exhaust gas of the particles is performed in a plurality of first filter groups of the filter installation, which have in each case a number of filter sleeves, - wherein the exhaust gas in a normal operation of the respective first filter group enters the filter sleeves of the respective first filter group at an intake air side and exits the filter sleeves of the respective first filter group at an exhaust air side, such that the particles as a filter cake accumulate at the intake air side of the filter sleeves of the respective first filter group, - wherein the filter sleeves of the respective first filter group at the exhaust air side in a cleaning operation of the respective first filter group by way of a first valve that is assigned to the respective first filter group are impinged with a cleaning gas, such that the filter cake that has accumulated at the intake air side of the filter sleeves of the respective first filter group is released from the intake air side of the filter sleeves of the respective first filter group, - wherein a loading of the exhaust gas with particles caused by the cleaning operation of the respective first filter group is detected by means of a sensor installation that is disposed in the exhaust air duct, - wherein a monitoring installation from the sensor installation receives the loadings of the exhaust gas with particles caused by the cleaning operation of the first filter groups and by virtue of the loading of the exhaust gas with particles caused by the cleaning operation of the respective first filter group, in conjunction with the loading of the exhaust gas caused by the cleaning operation of at least one further first filter group determines a state of the respective first filter group, and - wherein the monitoring installation determines the state of the respective first filter group by means of a proportion of the loading of the exhaust gas with particles caused by the cleaning operation of the respective first filter group in the sum of the loadings of the exhaust gas with particles caused by the cleaning operation of all first filter groups. - wherein the filter installation by way of an intake air duct is supplied an exhaust gas that is loaded with particles, the exhaust gas in the filter installation is relieved of the particles, and the exhaust gas relieved of the particles is discharged by the filter installation by way of an exhaust air duct, - wherein relieving a first part of the exhaust gas of the particles is performed in a plurality of first filter groups of the filter installation, which have in each case a number of filter sleeves, - wherein the exhaust gas in a normal operation of the respective first filter group enters the filter sleeves of the respective first filter group at an intake air side and exits the filter sleeves of the respective first filter group at an exhaust air side, such that the particles as a filter cake accumulate at the intake air side of the filter sleeves of the respective first filter group, - wherein the filter sleeves of the respective first filter group at the exhaust air side in a cleaning operation of the respective first filter group by way of a first valve that is assigned to the respective first filter group are impinged with a cleaning gas, such that the filter cake that has accumulated at the intake air side of the filter sleeves of the respective first filter group is released from the intake air side of the filter sleeves of the respective first filter group, - wherein a loading of the exhaust gas with particles caused by the cleaning operation of the respective first filter group is detected by means of a sensor installation that is disposed in the exhaust air duct, - wherein a monitoring installation from the sensor installation receives the loadings of the exhaust gas with particles caused by the cleaning operation of the first filter groups and by virtue of the loading of the exhaust gas with particles caused by the cleaning operation of the respective first filter group, in conjunction with the loading of the exhaust gas caused by the cleaning operation of at least one further first filter group determines a state of the respective first filter group, and - wherein the monitoring installation determines the state of the respective first filter group by means of a proportion of the loading of the exhaust gas with particles caused by the cleaning operation of the respective first filter group in the sum of the loadings of the exhaust gas with particles caused by the cleaning operation of all first filter groups.