A method of delegating data editing authority of product items, which is applied to a data management system comprising a database storing a plurality of product items, wherein the method comprises the steps of: A. selecting a plurality of product items in the database, which is done by a first party, and then defining the plurality of product items as a plurality of authorized items; B. generating an authorization code corresponding to the authorized items, and generating a notification message corresponding to the authorization code, which are done by the data management system, and giving the authorization code an effective period, which is done by the data management system; C. providing an electronic device (40, 50) connected to the data management system; responding to the notification message through the electronic device (40, 50), which is done by a second party; verifying the effective period of the authorization code, wherein taking step D and step E when the current date falls within the effective period; if the current date exceeds the effective period, step D and step E will not be taken; D. obtaining the authorized items from the database according to the authorization code which is corresponding to the notification message responded by the second party, and then transferring the authorized items to the electronic device (40, 50), which are done by the data management system; E. selecting at least one of the received authorized items through the electronic device (40, 50), and revising content of the selected authorized items, and then transferring the revised content to the database for storage; verifying the effective period of the authorization code with the data management system after the electronic device transfers the revised content to the data management system; if the current date falls within the effective period, stores the revised content transferred from the electronic device (40, 50); if the current date exceeds the effective period, the revised content transferred from the electronic device (40, 50) will not be stored. A. selecting a plurality of product items in the database, which is done by a first party, and then defining the plurality of product items as a plurality of authorized items; B. generating an authorization code corresponding to the authorized items, and generating a notification message corresponding to the authorization code, which are done by the data management system, and giving the authorization code an effective period, which is done by the data management system; C. providing an electronic device (40, 50) connected to the data management system; responding to the notification message through the electronic device (40, 50), which is done by a second party; verifying the effective period of the authorization code, wherein taking step D and step E when the current date falls within the effective period; if the current date exceeds the effective period, step D and step E will not be taken; D. obtaining the authorized items from the database according to the authorization code which is corresponding to the notification message responded by the second party, and then transferring the authorized items to the electronic device (40, 50), which are done by the data management system; E. selecting at least one of the received authorized items through the electronic device (40, 50), and revising content of the selected authorized items, and then transferring the revised content to the database for storage; verifying the effective period of the authorization code with the data management system after the electronic device transfers the revised content to the data management system; if the current date falls within the effective period, stores the revised content transferred from the electronic device (40, 50); if the current date exceeds the effective period, the revised content transferred from the electronic device (40, 50) will not be stored.