The invention provides an energy management method and system for various energy storage systems of considering operation and maintenance. The method comprises the following steps: reading related data of wind-solar power storage and generation systems and battery energy storage systems; calculating a filtering order reference value obtained from a standardized modulus cumulative mean value, and decomposing power signals into high-frequency signals, middle-frequency signals and low-frequency signals; determining active power and charged states of the energy storage systems at the current moment, judging whether the charged states of the energy storage systems at the current moment exceed a preset value or not, if so, stopping power smoothing control, or else, correcting power command values of the energy storage systems in real time according to the charged states and the actual power of the energy storage systems; judging charge and discharge states of the energy storage systems according to symbols of the active power of the energy storage systems, and calculating active power command values of energy storage battery units on the basis of the charge and discharge states of the energy storage systems; and carrying out charge and discharge control on the energy storage systems in real time. According to the energy management method and system for various energy storage systems, the overcharge and over-discharge phenomena of the energy storage systems can be prevented; and good properties of the energy storage systems are kept.