An information administration system configured of: a component information management apparatus (4) including a component information storing unit (41) storing component information after sectionalizing the component information into public information and non-public information, and also sectionalizing the non-public information into information for designing and information for manufacturing, and an encryption processing unit (42) encrypting the non-public information; a designing information management apparatus (2) including a first component information receiving unit (24) receiving the component information, a first decryption unit (25) decrypting non-public component information for designing, and a designing information storing unit (22) storing designing information that is designed by adding the received component information thereto; and a manufacturing apparatus (3) including a second decryption unit (33) decrypting the received non-public component information for manufacturing, and a drive controlling unit (34) controlling driving of the manufacturing apparatus based on the received manufacturing information and component information.