A regenerating system for a forge die (1) according to the invention comprises a detecting device (10) of a shape (2) of a die (1) to be regenerated, a welding system (30) configured such as to deposit welding material in the die (1), and a processor (20) configured such as to define welding pathways (11) in order to activate the welding system (30), wherein the welding pathways (11) are defined according to the shape (2) detected and a predefined shape of the die (1).