The purpose of this study was to develop a course guideline of “Vehicle and Environmental Protection” in industrial vocational high school in Taiwan. A modified Delphi technique was selected for use in this study. The modified Delphi technique is similar to the full Delphi in terms of procedure (i.e., a series of rounds with selected experts) and intent (i.e., to predict future events and to arrive at consensus). A 32- member Delphi panel were asked to participate in the study. and a steering committee and a three rounds of the modified Delphi technique were conducted to this study. The steering committee first categorized the teaching units/items according to the Bloom's taxonomy of educational objectives and 9 teaching units and 36 specific items were organized into a draft survey instrument. Then, through a three rounds the process is designed to yield consensus. For each item, standard deviation were calculated as measures of dispersion and median and mean scores were calculated as measures of central tendency. Based on an analysis of the findings of this study, the following conclusions were made: 1. The framework of course guideline for “Vehicle and Environmental Protection” in industrial vocational school included three dimensions: (a)teaching objective (b)curriculum planning outline and (c)teaching units/items. 2. Based on the finding that 40 of the 44 items (90.91%) received final mean ratings within the interval of 2.400 to 2.999 on third rated of importance, it was concluded that teaching items in this research study for “vehicle and environmental protection” course guideline are necessary and important. Although the other four items ranked lower, they received mean ratings which substantiated a moderate degree of importance. 3. The ten highest rated teaching items were, (1)know 3R, (2)know the sources and varieties of vehicle emissions, (3)know the sources and varieties of vehicle waste oil, (4)wastes treatment and reuse, (5)refrigerant recycling, (6)know the alternative vehicle, (7)air pollution sorurce, (8)sources and varieties of vehicle wastes, (9)know the recycling-parts of the vehicle, (10)meaning and significant of environmental protection. 4. Based on the results of independent t-test that there was no significant effect (p>0.05) in the eight teaching units between groups.