Offline package generation method and software package installation method

The invention discloses an off-line package generation method and a software package installation method.The off-line package generation method comprises the steps that when an instruction for making an off-line package is monitored, a target file is created, and the target file comprises a first sub-file, a second sub-file and a third sub-file; software packages corresponding to the to-be-downloaded software package information are downloaded into the first sub-file, any software package corresponds to one running environment data file depended during running, the running environment data files corresponding to all the downloaded software packages are stored into the second sub-file, encryption processing is conducted on the first sub-file and the second sub-file, and the first sub-file and the second sub-file are stored into the second sub-file. And storing the first encrypted file and the second encrypted file in a third sub-file, and compressing the target file to obtain an offline package. Therefore, the