An administration device in a system in which a first device group and a second device group are connected to a network. The administration device acquires first communication history of the first device group and second communication history of the second device group, compares first specific information which specifies communication source and communication destination of the first communication history and second specific information which specifies communication source and communication destination of the second communication history while referring to relating information and detects a setting error of the second specific information set in the devices of the second device group based on a result of the comparison.