A Yet Another Next Generation (YANG) module management method includes that a first network device determines a target YANG package in a second network device. The target YANG package includes at least two service-related YANG modules. The first network device generates a processing instruction for the target YANG package, and sends the processing instruction to the second network device. The processing instruction includes an identifier of the target YANG package. The identifier of the target YANG package includes a name of the target YANG package or the name and version information of the target YANG package.