Program version verification method and software development system using the same

A program version verification method adapted to a software development system including a target host and a version check server. The target host transmits program information of a release version of a developing program to the version check server. The version check server determines whether the release version is earlier than a previous version of the developing program corresponding to the target host according to the program information, and transmits a first prompting message to the target host if the release version is earlier than the previous version. Otherwise, the target host transmits the developing program to at least one forward host or deploys the release version of the developing program on the target host. In which, the previous version includes a transmitted version of the developing program that has been transmitted to the forward host by the target host, or a test version of the developing program deployed on the target host.