1. An information processing apparatus connectable to a plurality of devices of different types via a network, the information processing apparatus comprising: a receiving unit that receives, from the devices, management information of each of the devices in a data format corresponding to the respective devices; a first storage unit that stores therein a first conversion rule for converting the management information into manage information in a first common data format common to the devices; and a conversion unit that converts the management information thus received into management information in the first common data format based on the first conversion rule.