Before 2001，due to the lack of a consensus of knowledge system about the homeland security concepts，scope，criteria and methods，the universities did not have the curriculum in term of homeland security. After the 9/11 attack，as the Homeland Security Act passed and the Homeland Security Department established，the Homeland Security curriculum had been gradually developed. Moreover，along with the proposed Homeland Security strategy report and the enrichment of the following quadrennial review of Homeland Security，the concept of Homeland Security thus was clearly defined.