In order to understand the latest progress of health decision support system (HDSS) construction, grasp the law of HDSS development and adopt the international advanced experience, this paper took Australia for example, presented a comparative analysis on the construction practices, including the contents, features and system functions of national construction guidelines for HDSS in different periods, and showed the integral development level of Australia HDSS was still in the exploratory stage, and its construction goal, function orientation and construction mechanism got improved gradually with the deep development of public health information. Additionally, to assure the accuracy and safety of HDSS function, Australia has been laying stress on the standard specification construction and system function authentication.