The invention provides a method and a system for acquiring a typical working condition curve of an energy storage system. The method comprises steps: data are read; charging and discharging power data of the energy storage system are determined or read, and a charging and discharging power matrix is formed; a characteristic power value vector is obtained, a typical power value of the energy storage system is determined; and typical power values at all times are dug and integrated, and a typical working condition curve of the energy storage system is obtained. The system comprises a communication module, a data storage and management module, a smoothing controller module and a typical working condition curve digging module in mutual communication. According to the method and the system provided in the invention, extraction and generalization on an operating characteristic curve of the energy storage system are realized, overall cognition on the charging and discharging power condition of the energy storage system is realized, problems such as capacity configuration are solved in an assisted mode, the extracted typical working condition curve can be used to compress a data quantity, the calculation amount is saved, accurate acquisition of the typical working condition of a new energy and energy storage hybrid power generation system is realized, and the operation reliability and the stability of the new energy and energy storage hybrid power generation system are improved.