Equipment remote upgrading method and device, terminal and storage medium

The invention provides an equipment remote upgrading method and device, a terminal and a storage medium, and the method comprises the steps: for each sub-file in an upgrading package, judging whether the file size corresponding to the sub-file is greater than the temporary storage space of target equipment or not; if the file size corresponding to the sub-file is larger than the temporary storage space, downloading the sub-file into the temporary storage space in a segmented manner based on the offset address of the sub-file and the size of the temporary storage space, and downloading the sub-file into the temporary storage space before downloading a next file segment every time. Replacing the original file corresponding to the current file segment in the local storage space with the current file segment downloaded to the temporary storage space, and deleting the current file segment in the temporary storage space; and upgrading the target equipment based on the sub-file. By downloading and writing the sub-fi