The invention discloses a health analysis method for operation and maintenance management, and the method comprises the steps: merging the collected real-time condition information, and storing the collected real-time condition information, so as to form historical data; calculating and obtaining a data curve-health operation base line of a management target index changing with time according to the historical data; taking the base line as the center, and setting a reasonable fluctuation range-upper and lower threshold values of the index data; judging the state to be normal if the management object index data fluctuates between the upper and lower threshold values, or else, judging the state to be an off normal state; judging the health trend of an operation and maintenance management system through counting the off normal frequency, collecting the operation data of each monitoring point, comparing the operation data with the health standard in a time period, obtaining a deviation value of health conditions, and triggering the processing if the deviation value exceeds an allowed range. The method can obtain the operation health trend of the system, finds the symptom of a problem, gives a prompt, takes preventive measures, and improves the quality and efficiency of operation and maintenance management.