1. A method of collecting information for managing a computer system equipped with a plurality of devices, a management computer being coupled to the plurality of devices, the plurality of devices including at least one computer, the management computer including a first communication device coupled to the at least one computer, a first processor coupled to the first communication device, and a first memory coupled to the first processor, the at least one computer including a second communication device coupled to the management computer, a second processor coupled to the second communication device, and a second memory coupled to the second processor, the management computer holding rule information for associating at least one event set including a plurality of events detected by the plurality of devices with a conclusion output when all of the plurality of events included in the at least one event set have been detected, the at least one event set including a first event set containing a first plurality of events, the rule information containing a first rule for associating the first event set with a first conclusion output when all of the first plurality of events included in the first event set have been detected, the method comprising: a first step of executing, by the management computer, at a first interval, polling to obtain information indicating whether each of the first plurality of events has been detected; a second step of judging, by the management computer, based on a response to the polling, whether the first plurality of events have been detected; and a third step of executing, by the management computer, upon judgment that at least one of the first plurality of events has been detected and none of the remaining events have been detected, before execution of next polling at the first interval, polling to obtain information indicating whether at least one of the undetected remaining event has been detected.