PURPOSE: To provide a data management system in object direction, by which data can be accessed at high speed compared to a conventional case, by searching the data management table of chain structure in an object with a data identification number as a key.

CONSTITUTION: A data identification number registration means 107 deciding a data identification number 108 which is uniquely decided to a data name from a registered data name 105 and registering the group of the data name 105 and the identification number 108, a data registration means 109 registering the group of the data identification number 108 and registered data 106 for the respective objects, a data identification number searching means 111 searching the data identification number 112 of a data name 110 from a registered data identification number group and a data searching means 113 searching and accessing data 114 registered in the target object with the searched data identification number 112 as the key are provided.