9. The model edit control system as claimed in claim 1 , wherein the action log manager comprises: a log file creator, wherein the log file creator is configured to create a model log file for the stored model and a current copy log file when a model copy is created; a model log file handler, wherein the model log file hander is configured to track and record, in the model log file, actions executed on the stored model; and a current copy log file handler, wherein the current copy log file hander is configured to track and record, in the current log file, actions executed on its corresponding model copy.
9. The model edit control system as claimed in claim 1 , wherein the action log manager comprises: a log file creator, wherein the log file creator is configured to create a model log file for the stored model and a current copy log file when a model copy is created; a model log file handler, wherein the model log file hander is configured to track and record, in the model log file, actions executed on the stored model; and a current copy log file handler, wherein the current copy log file hander is configured to track and record, in the current log file, actions executed on its corresponding model copy. 11. The model edit control system as claimed in claim 9 , wherein the action log manager provides history information of the stored model based on the model log file.