Firmware upgrading method, device and system and storage medium

The invention provides a firmware upgrading method, device and system and a storage medium, the firmware upgrading method, device and system are applied to an upper computer, the upper computer is electrically connected with an electronic equipment charging box through a physical data link, and the electronic equipment charging box is electrically connected with electronic equipment through a hardware interface. The method comprises the following steps: acquiring a firmware version number of the electronic equipment charging box and the electronic equipment; according to the electronic equipment charging box and the firmware version number of the electronic equipment, to-be-upgraded equipment is determined, and the to-be-upgraded equipment comprises the electronic equipment charging box and/or the electronic equipment; and sending a firmware upgrade package corresponding to the to-be-upgraded device to the electronic device charging box, so that the electronic device charging box triggers the to-be-upgraded d