An information managing method for managing information based upon an electronic message containing apparatus information or event information transmitted from a substrate processing apparatus, the information managing method comprising: storing the apparatus information of the substrate processing apparatus at a transmission time of the electronic message in a first apparatus information storage unit; comparing the event information with a condition for accumulating the apparatus information when the electronic message is transmitted; and accumulating the apparatus information in a second apparatus information storage unit by associating the apparatus information with a time stamp of a generation of the event information when the condition is satisfied.