A product lifecycle data management system includes a data processing terminal, a memory medium and a management server. The data processing terminal receives a first ID and a product related data; transmits the first ID and the product related data to the memory medium. The memory medium compares the first ID with a previously stored second ID; stores the product related data when the first ID is the same as the second ID; and transmits the first process ending data and a first key data corresponding to the second ID previously stored. The data processing terminal transmits the first ID, the product related data and a first key data to the management server. The management server transmits a second process ending data to the data processing terminal, when the first ID and the first key data are the same as a third ID and a second key data stored previously.