A power system management device manages the operational states of a plurality of power systems each including a power generator and a power conditioner connected to each other, and can promptly inform a user of erroneous setting of configuration information. The management device stores configuration information in correspondence with each power system including a power generator (photovoltaic array) and a power conditioner connected to each other. The configuration information indicates the configuration of each power system and includes one or more configuration information elements set by a user. The management device determines whether the configuration information includes at least one configuration information element that has been possibly set erroneously using information obtained from the power conditioner of each power system, and outputs a message prompting verification and correction of configuration information determined to include at least one configuration information element that has been possibly set erroneously.