An equipment inspecting device for inspecting at least one piece of equipment positioned in an office from among a plurality of offices included in the equipment inspection target recognizes office information for indicating a position of an office, and searches office equipment information for indicating a previous state of at least one piece of equipment positioned in the office by using the office information. The equipment inspecting device transmits the searched office equipment information to the equipment information collecting device so that an equipment information collecting device for collecting at least one piece of equipment information corresponding to at least one piece of equipment may generate update information for indicating a state change of at least one piece of equipment. Also, the equipment inspecting device receives the update information from the equipment information collecting device, and updates office equipment information by using the update information.