Data necessary for diagnosing the condition of software of a virtual living thing or the condition of a hardware keeping the virtual living thing are acquired from the hardware or a storage medium storing the software, and are analyzed, and the condition of the virtual living thing is diagnosed on the basis of the analysis result. Besides, data necessary for diagnosing the hardware or the software of a robot apparatus are acquired from the robot apparatus or the storage medium storing the software, and are analyzed, and the condition of the robot apparatus is diagnosed on the basis of the analysis result.