A monitoring system of components of a gas turbine (1) comprising: a acquisition device (3) of signals proportional to functioning parameters characteristic of the functioning state of a gas turbine (1), a first electronic processing unit (4) comprising a first data base, a second electronic processing unit (6), a data transfer device, capable of electronically conveying the contents of said first data base to a second electronic processing unit (6), a monitoring program associated with said second electronic processing unit (6) comprising a library of algorithms, which allow the performances of the gas turbine (1) and its components to be determined by comparing data coming from subsequent recordings of said functioning parameters, a display device associated with said second electronic processing unit (6) whereby it is possible to gain access to the functionality of said monitoring program by means of a graphic interface.