Method of managing system health

A method of managing health of a system by using a diagnosis model pre-learned based on multi-domain data including first and second domain data, the method comprising:

• calculating a reconstruction missing value with respect to the second domain data;
• determining a degree of degradation of the system on the basis of the reconstruction missing value;
• predicting a second remaining useful life (RUL) prediction value {tilde over (y)} of the system on the basis of the second domain data, based on a result of the determination of the degree of degradation;
• optimizing a degradation compensation function on the basis of a distribution of a first RUL prediction value y of the system predicted based on the first domain data in a pre-learning process of the diagnosis model;
• and
• predicting a final RUL prediction value {tilde over (y)}′ obtained by compensating for the second RUL prediction value {tilde over (y)}, by using the optimized degradation compensation function.