Abstract: Provided is an analyzing method using a platform for analyzing health of a heavy electric machine. The method includes inputting on-site diagnosis information in which pieces of data collected in a site are received in a state in which operation of the heavy electric machine stops, collecting pieces of online sensor data in which pieces of data of installed sensors are periodically/discontinuously collected through a sensor module and a data collection module, building a database using the data in the inputting of the on-site diagnosis information and the data in the collecting of the pieces of online sensor data, analyzing of the current standard health of the heavy electric machine, and automatically determining a diagnosis result.