Health management method and device of fuel cell engine system and electric vehicle

The invention discloses a health management method and device of a fuel cell engine system and an electric vehicle, the fuel cell engine system comprises a fuel cell and a fuel cell BOP, and the method comprises the following steps: obtaining working condition information and environment information of the fuel cell engine system; determining an attenuation prediction curve of the fuel cell engine system according to the working condition information and/or the environment information, wherein the attenuation prediction curve comprises an attenuation prediction curve of a fuel cell and an attenuation prediction curve of a fuel cell BOP; predicting the residual life of the fuel cell according to the working condition information, the environment information and the attenuation prediction curve of the fuel cell, and predicting the residual life of the fuel cell BOP according to the working condition information and the attenuation prediction curve of the fuel cell BOP; and carrying out maintenance prompting acc