In daily life, there is natural radiation everywhere. However in Taiwan’s elementary and high school, there is no specially designed teaching material regarding radiation. Therefore in March 2011, when the nuclear incident happened in Fukushima, Japan, Taiwan residents were freaked out about the radiation. Therefore, it is urgent to undergo radiation education in sustainable education. This studies aims at constructing environmental ionizing radiation curriculum indicators for Taiwan’s elementary and high school, and providing guidelines for schools and education administration to promote ionizing radiation curriculum.This studies utilizes Fuzzy Delphi and Analytical Hierarchy Process to undertake two stages of questionnaires, compile opinions and views from 25 experts, in order to construct environmental ionizing radiation curriculum indicators. Research results shows: (1) To construct ionizing radiation curriculum indicators. Utilizes Fuzzy Delphi and selected 36 evaluation indicators under five levels of “knowing radiation”, “the application of radiation in daily life”, “the monitor of ionizing radiation”, and “emergency measures for nuclear accidents”. (2) Utilizes Analytical Hierarchy Process to decide the priority of the environmental ionizing radiation curriculum indicators. The structure of ionizing radiation curriculum indicators and opinions made by experts in questionnaires are referred, and summed up some key elements to implement.For Taiwan elementary and high schools, they can refer to environmental ionizing radiation curriculum indicators, in order to develop and evaluate the implementation and effectiveness. The priority can be referred when select the topics.